diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 738c684f55..c43d1074df 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1575,12 +1575,12 @@ module ts {
                         }
 
                         // Container of resolvedExportSymbol is visible
-                        return forEach(resolvedExportSymbol.declarations, (declaration: Node) => {
-                            while (declaration) {
-                                if (declaration === node) {
+                        return forEach(resolvedExportSymbol.declarations, (current: Node) => {
+                            while (current) {
+                                if (current === node) {
                                     return true;
                                 }
-                                declaration = declaration.parent;
+                                current = current.parent;
                             }
                         });
                     }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 81b96ed307..e97aaeb2ed 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -421,6 +421,7 @@ module ts {
         exprName: EntityName;
     }
 
+    // A TypeLiteral is the declaration node for an anonymous symbol.
     export interface TypeLiteralNode extends TypeNode, Declaration {
         members: NodeArray<Node>;
     }
@@ -547,7 +548,8 @@ module ts {
     export interface ArrayLiteralExpression extends PrimaryExpression {
         elements: NodeArray<Expression>;
     }
-
+    
+    // An ObjectLiteralExpression is the declaration node for an anonymous symbol.
     export interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
         properties: NodeArray<Declaration>;
     }