diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ab32682c90a..994b00abae6 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -87,7 +87,6 @@ module ts {
             getTypeOfExpression: getTypeOfExpression,
             typeToString: typeToString,
             symbolToString: symbolToString,
-            writeTypeToTextWriter: writeTypeToTextWriter,
             getAugmentedPropertiesOfApparentType: getAugmentedPropertiesOfApparentType
         };
 
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 05e2ce641c0..6ca6035a968 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -602,7 +602,6 @@ module ts {
         getTypeOfExpression(node: Expression, contextualType?: Type, contextualMapper?: TypeMapper): Type;
         typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
         symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
-        writeTypeToTextWriter(type: Type, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: TextWriter): void;
         getAugmentedPropertiesOfApparentType(type: Type): Symbol[];
     }