diff --git a/lib/tsc.js b/lib/tsc.js
index a406821066..45fa034a5d 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -13414,6 +13414,7 @@ var ts;
         var assignableRelation = ts.createMap();
         var comparableRelation = ts.createMap();
         var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
         var _displayBuilder;
         var builtinGlobals = ts.createMap();
         builtinGlobals[undefinedSymbol.name] = undefinedSymbol;
@@ -18129,8 +18130,14 @@ var ts;
             if (source === target) {
                 return true;
             }
-            if (source.symbol.name !== target.symbol.name || !(source.symbol.flags & 256) || !(target.symbol.flags & 256)) {
-                return false;
+            var id = source.id + "," + target.id;
+            if (enumRelation[id] !== undefined) {
+                return enumRelation[id];
+            }
+            if (source.symbol.name !== target.symbol.name ||
+                !(source.symbol.flags & 256) || !(target.symbol.flags & 256) ||
+                (source.flags & 524288) !== (target.flags & 524288)) {
+                return enumRelation[id] = false;
             }
             var targetEnumType = getTypeOfSymbol(target.symbol);
             for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
@@ -18141,11 +18148,11 @@ var ts;
                         if (errorReporter) {
                             errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
                         }
-                        return false;
+                        return enumRelation[id] = false;
                     }
                 }
             }
-            return true;
+            return enumRelation[id] = true;
         }
         function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
             if (target.flags & 8192)
@@ -18169,10 +18176,19 @@ var ts;
             if (relation === assignableRelation || relation === comparableRelation) {
                 if (source.flags & 1)
                     return true;
-                if (source.flags & (4 | 64) && target.flags & 16)
+                if ((source.flags & 4 | source.flags & 64) && target.flags & 272)
                     return true;
-                if (source.flags & 64 && target.flags & 256 && source.text === target.text)
+                if (source.flags & 256 &&
+                    target.flags & 256 &&
+                    source.text === target.text &&
+                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
                     return true;
+                }
+                if (source.flags & 256 &&
+                    target.flags & 16 &&
+                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
+                    return true;
+                }
             }
             return false;
         }
@@ -36543,7 +36559,7 @@ var ts;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    ts.version = "2.0.2";
+    ts.version = "2.0.3";
     var emptyArray = [];
     function findConfigFile(searchPath, fileExists) {
         while (true) {
diff --git a/lib/tsserver.js b/lib/tsserver.js
index b469d67279..3c0cd955fc 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -14410,6 +14410,7 @@ var ts;
         var assignableRelation = ts.createMap();
         var comparableRelation = ts.createMap();
         var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
         var _displayBuilder;
         var builtinGlobals = ts.createMap();
         builtinGlobals[undefinedSymbol.name] = undefinedSymbol;
@@ -19125,8 +19126,14 @@ var ts;
             if (source === target) {
                 return true;
             }
-            if (source.symbol.name !== target.symbol.name || !(source.symbol.flags & 256) || !(target.symbol.flags & 256)) {
-                return false;
+            var id = source.id + "," + target.id;
+            if (enumRelation[id] !== undefined) {
+                return enumRelation[id];
+            }
+            if (source.symbol.name !== target.symbol.name ||
+                !(source.symbol.flags & 256) || !(target.symbol.flags & 256) ||
+                (source.flags & 524288) !== (target.flags & 524288)) {
+                return enumRelation[id] = false;
             }
             var targetEnumType = getTypeOfSymbol(target.symbol);
             for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
@@ -19137,11 +19144,11 @@ var ts;
                         if (errorReporter) {
                             errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
                         }
-                        return false;
+                        return enumRelation[id] = false;
                     }
                 }
             }
-            return true;
+            return enumRelation[id] = true;
         }
         function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
             if (target.flags & 8192)
@@ -19165,10 +19172,19 @@ var ts;
             if (relation === assignableRelation || relation === comparableRelation) {
                 if (source.flags & 1)
                     return true;
-                if (source.flags & (4 | 64) && target.flags & 16)
+                if ((source.flags & 4 | source.flags & 64) && target.flags & 272)
                     return true;
-                if (source.flags & 64 && target.flags & 256 && source.text === target.text)
+                if (source.flags & 256 &&
+                    target.flags & 256 &&
+                    source.text === target.text &&
+                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
                     return true;
+                }
+                if (source.flags & 256 &&
+                    target.flags & 16 &&
+                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
+                    return true;
+                }
             }
             return false;
         }
@@ -37539,7 +37555,7 @@ var ts;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    ts.version = "2.0.2";
+    ts.version = "2.0.3";
     var emptyArray = [];
     function findConfigFile(searchPath, fileExists) {
         while (true) {
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index 2c5f0a8bf2..bf90d17d54 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -14410,6 +14410,7 @@ var ts;
         var assignableRelation = ts.createMap();
         var comparableRelation = ts.createMap();
         var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
         var _displayBuilder;
         var builtinGlobals = ts.createMap();
         builtinGlobals[undefinedSymbol.name] = undefinedSymbol;
@@ -19125,8 +19126,14 @@ var ts;
             if (source === target) {
                 return true;
             }
-            if (source.symbol.name !== target.symbol.name || !(source.symbol.flags & 256) || !(target.symbol.flags & 256)) {
-                return false;
+            var id = source.id + "," + target.id;
+            if (enumRelation[id] !== undefined) {
+                return enumRelation[id];
+            }
+            if (source.symbol.name !== target.symbol.name ||
+                !(source.symbol.flags & 256) || !(target.symbol.flags & 256) ||
+                (source.flags & 524288) !== (target.flags & 524288)) {
+                return enumRelation[id] = false;
             }
             var targetEnumType = getTypeOfSymbol(target.symbol);
             for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
@@ -19137,11 +19144,11 @@ var ts;
                         if (errorReporter) {
                             errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
                         }
-                        return false;
+                        return enumRelation[id] = false;
                     }
                 }
             }
-            return true;
+            return enumRelation[id] = true;
         }
         function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
             if (target.flags & 8192)
@@ -19165,10 +19172,19 @@ var ts;
             if (relation === assignableRelation || relation === comparableRelation) {
                 if (source.flags & 1)
                     return true;
-                if (source.flags & (4 | 64) && target.flags & 16)
+                if ((source.flags & 4 | source.flags & 64) && target.flags & 272)
                     return true;
-                if (source.flags & 64 && target.flags & 256 && source.text === target.text)
+                if (source.flags & 256 &&
+                    target.flags & 256 &&
+                    source.text === target.text &&
+                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
                     return true;
+                }
+                if (source.flags & 256 &&
+                    target.flags & 16 &&
+                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
+                    return true;
+                }
             }
             return false;
         }
@@ -37539,7 +37555,7 @@ var ts;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
-    ts.version = "2.0.2";
+    ts.version = "2.0.3";
     var emptyArray = [];
     function findConfigFile(searchPath, fileExists) {
         while (true) {
diff --git a/lib/typescript.js b/lib/typescript.js
index a1d387f253..4dd7530f30 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -16791,6 +16791,7 @@ var ts;
         var assignableRelation = ts.createMap();
         var comparableRelation = ts.createMap();
         var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
         // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
         var _displayBuilder;
         var TypeSystemPropertyName;
@@ -22135,8 +22136,14 @@ var ts;
             if (source === target) {
                 return true;
             }
-            if (source.symbol.name !== target.symbol.name || !(source.symbol.flags & 256 /* RegularEnum */) || !(target.symbol.flags & 256 /* RegularEnum */)) {
-                return false;
+            var id = source.id + "," + target.id;
+            if (enumRelation[id] !== undefined) {
+                return enumRelation[id];
+            }
+            if (source.symbol.name !== target.symbol.name ||
+                !(source.symbol.flags & 256 /* RegularEnum */) || !(target.symbol.flags & 256 /* RegularEnum */) ||
+                (source.flags & 524288 /* Union */) !== (target.flags & 524288 /* Union */)) {
+                return enumRelation[id] = false;
             }
             var targetEnumType = getTypeOfSymbol(target.symbol);
             for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
@@ -22147,11 +22154,11 @@ var ts;
                         if (errorReporter) {
                             errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
                         }
-                        return false;
+                        return enumRelation[id] = false;
                     }
                 }
             }
-            return true;
+            return enumRelation[id] = true;
         }
         function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
             if (target.flags & 8192 /* Never */)
@@ -22175,10 +22182,19 @@ var ts;
             if (relation === assignableRelation || relation === comparableRelation) {
                 if (source.flags & 1 /* Any */)
                     return true;
-                if (source.flags & (4 /* Number */ | 64 /* NumberLiteral */) && target.flags & 16 /* Enum */)
+                if ((source.flags & 4 /* Number */ | source.flags & 64 /* NumberLiteral */) && target.flags & 272 /* EnumLike */)
                     return true;
-                if (source.flags & 64 /* NumberLiteral */ && target.flags & 256 /* EnumLiteral */ && source.text === target.text)
+                if (source.flags & 256 /* EnumLiteral */ &&
+                    target.flags & 256 /* EnumLiteral */ &&
+                    source.text === target.text &&
+                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
                     return true;
+                }
+                if (source.flags & 256 /* EnumLiteral */ &&
+                    target.flags & 16 /* Enum */ &&
+                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
+                    return true;
+                }
             }
             return false;
         }
@@ -43950,7 +43966,7 @@ var ts;
 var ts;
 (function (ts) {
     /** The version of the TypeScript compiler release */
-    ts.version = "2.0.2";
+    ts.version = "2.0.3";
     var emptyArray = [];
     function findConfigFile(searchPath, fileExists) {
         while (true) {
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index a1d387f253..4dd7530f30 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -16791,6 +16791,7 @@ var ts;
         var assignableRelation = ts.createMap();
         var comparableRelation = ts.createMap();
         var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
         // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
         var _displayBuilder;
         var TypeSystemPropertyName;
@@ -22135,8 +22136,14 @@ var ts;
             if (source === target) {
                 return true;
             }
-            if (source.symbol.name !== target.symbol.name || !(source.symbol.flags & 256 /* RegularEnum */) || !(target.symbol.flags & 256 /* RegularEnum */)) {
-                return false;
+            var id = source.id + "," + target.id;
+            if (enumRelation[id] !== undefined) {
+                return enumRelation[id];
+            }
+            if (source.symbol.name !== target.symbol.name ||
+                !(source.symbol.flags & 256 /* RegularEnum */) || !(target.symbol.flags & 256 /* RegularEnum */) ||
+                (source.flags & 524288 /* Union */) !== (target.flags & 524288 /* Union */)) {
+                return enumRelation[id] = false;
             }
             var targetEnumType = getTypeOfSymbol(target.symbol);
             for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
@@ -22147,11 +22154,11 @@ var ts;
                         if (errorReporter) {
                             errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
                         }
-                        return false;
+                        return enumRelation[id] = false;
                     }
                 }
             }
-            return true;
+            return enumRelation[id] = true;
         }
         function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
             if (target.flags & 8192 /* Never */)
@@ -22175,10 +22182,19 @@ var ts;
             if (relation === assignableRelation || relation === comparableRelation) {
                 if (source.flags & 1 /* Any */)
                     return true;
-                if (source.flags & (4 /* Number */ | 64 /* NumberLiteral */) && target.flags & 16 /* Enum */)
+                if ((source.flags & 4 /* Number */ | source.flags & 64 /* NumberLiteral */) && target.flags & 272 /* EnumLike */)
                     return true;
-                if (source.flags & 64 /* NumberLiteral */ && target.flags & 256 /* EnumLiteral */ && source.text === target.text)
+                if (source.flags & 256 /* EnumLiteral */ &&
+                    target.flags & 256 /* EnumLiteral */ &&
+                    source.text === target.text &&
+                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
                     return true;
+                }
+                if (source.flags & 256 /* EnumLiteral */ &&
+                    target.flags & 16 /* Enum */ &&
+                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
+                    return true;
+                }
             }
             return false;
         }
@@ -43950,7 +43966,7 @@ var ts;
 var ts;
 (function (ts) {
     /** The version of the TypeScript compiler release */
-    ts.version = "2.0.2";
+    ts.version = "2.0.3";
     var emptyArray = [];
     function findConfigFile(searchPath, fileExists) {
         while (true) {
diff --git a/package.json b/package.json
index cb535b17c7..1cc479d060 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
     "name": "typescript",
     "author": "Microsoft Corp.",
     "homepage": "http://typescriptlang.org/",
-    "version": "2.0.2",
+    "version": "2.0.3",
     "license": "Apache-2.0",
     "description": "TypeScript is a language for application scale JavaScript development",
     "keywords": [
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 9d9af0fe84..598a117645 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -5,7 +5,7 @@
 namespace ts {
     /** The version of the TypeScript compiler release */
 
-    export const version = "2.0.2";
+    export const version = "2.0.3";
 
     const emptyArray: any[] = [];