diff --git a/src/services/breakpoints.ts b/src/services/breakpoints.ts
index 12de22d3bd..749eef5e8c 100644
--- a/src/services/breakpoints.ts
+++ b/src/services/breakpoints.ts
@@ -798,7 +798,6 @@ module TypeScript.Services.Breakpoints {
             var container = Syntax.containingNode(varDeclarationNode);
             var varDeclarationSyntax = <TypeScript.VariableDeclarationSyntax>varDeclarationNode;
             var varDeclarators = varDeclarationSyntax.variableDeclarators;
-            var varDeclaratorsCount = childCount(varDeclarators); // varDeclarators has to be non null because its checked in canHaveBreakpoint
 
             if (container && container.kind() == TypeScript.SyntaxKind.VariableStatement) {
                 return this.breakpointSpanOfVariableStatement(container);
diff --git a/src/services/signatureInfoHelpers.ts b/src/services/signatureInfoHelpers.ts
index 145dcc0238..8594a5dd32 100644
--- a/src/services/signatureInfoHelpers.ts
+++ b/src/services/signatureInfoHelpers.ts
@@ -211,8 +211,6 @@ module TypeScript.Services {
             signatureGroupInfo.signatureInfo = TypeScript.MemberName.memberNameToString(symbolName, paramIndexInfo);
             signatureGroupInfo.docComment = symbol.docComments();
 
-            var parameterMarkerIndex = 0;
-
             var typeSymbol = symbol.type;
 
             var typeParameters = typeSymbol.getTypeParameters();
diff --git a/src/services/syntax/syntaxTree.ts b/src/services/syntax/syntaxTree.ts
index de4c4cf7ad..0ae43ee3a1 100644
--- a/src/services/syntax/syntaxTree.ts
+++ b/src/services/syntax/syntaxTree.ts
@@ -84,7 +84,6 @@ module TypeScript {
         private cacheSyntaxTreeInfo(): void {
             // If we're not keeping around the syntax tree, store the diagnostics and line
             // map so they don't have to be recomputed.
-            var sourceUnit = this.sourceUnit();
             var firstToken = firstSyntaxTreeToken(this);
             var leadingTrivia = firstToken.leadingTrivia(this.text);
 
diff --git a/src/services/syntax/syntaxTrivia.ts b/src/services/syntax/syntaxTrivia.ts
index 1c8d79cf6b..38e641d86f 100644
--- a/src/services/syntax/syntaxTrivia.ts
+++ b/src/services/syntax/syntaxTrivia.ts
@@ -150,7 +150,6 @@ module TypeScript.Syntax {
 
             // When we run into a newline for the first time, create the string builder and copy
             // all the values up to this newline into it.
-            var isCarriageReturnLineFeed = false;
             switch (ch) {
                 case CharacterCodes.carriageReturn:
                     if (i < triviaText.length - 1 && triviaText.charCodeAt(i + 1) === CharacterCodes.lineFeed) {