diff --git a/src/services/syntax/scanner.ts b/src/services/syntax/scanner.ts
index be2abd11b4f..759559672c4 100644
--- a/src/services/syntax/scanner.ts
+++ b/src/services/syntax/scanner.ts
@@ -252,6 +252,7 @@ module TypeScript.Scanner {
 
     class FixedWidthTokenWithNoTrivia implements ISyntaxToken {
         public _primaryExpressionBrand: any; public _memberExpressionBrand: any; public _leftHandSideExpressionBrand: any; public _postfixExpressionBrand: any; public _unaryExpressionBrand: any; public _expressionBrand: any; public _typeBrand: any; public _syntaxNodeOrTokenBrand: any;
+        public parent: ISyntaxElement;
 
         constructor(private _packedData: number) {
         }
@@ -286,8 +287,10 @@ module TypeScript.Scanner {
 
     class LargeScannerToken implements ISyntaxToken {
         public _primaryExpressionBrand: any; public _memberExpressionBrand: any; public _leftHandSideExpressionBrand: any; public _postfixExpressionBrand: any; public _unaryExpressionBrand: any; public _expressionBrand: any; public _typeBrand: any; public _syntaxNodeOrTokenBrand: any;
+        public parent: ISyntaxElement;
 
         private cachedText: string;
+
         constructor(private _packedFullStartAndInfo: number, private _packedFullWidthAndKind: number, cachedText: string) {
             if (cachedText !== undefined) {
                 this.cachedText = cachedText;
diff --git a/src/services/syntax/syntaxElement.ts b/src/services/syntax/syntaxElement.ts
index 78418950a57..6b6dc7d4a7a 100644
--- a/src/services/syntax/syntaxElement.ts
+++ b/src/services/syntax/syntaxElement.ts
@@ -367,7 +367,7 @@ module TypeScript {
 
     export interface ISyntaxElement {
         kind(): SyntaxKind;
-        parent?: ISyntaxElement;
+        parent: ISyntaxElement;
     }
 
     export interface ISyntaxNode extends ISyntaxNodeOrToken {
diff --git a/src/services/syntax/syntaxToken.ts b/src/services/syntax/syntaxToken.ts
index 28045ddc37e..876316bc995 100644
--- a/src/services/syntax/syntaxToken.ts
+++ b/src/services/syntax/syntaxToken.ts
@@ -305,6 +305,7 @@ module TypeScript.Syntax {
 
     class EmptyToken implements ISyntaxToken {
         public _primaryExpressionBrand: any; public _memberExpressionBrand: any; public _leftHandSideExpressionBrand: any; public _postfixExpressionBrand: any; public _unaryExpressionBrand: any; public _expressionBrand: any; public _typeBrand: any; public _syntaxNodeOrTokenBrand: any;
+        public parent: ISyntaxElement;
 
         constructor(private _kind: SyntaxKind) {
         }
@@ -428,6 +429,7 @@ module TypeScript.Syntax {
         private _trailingTrivia: ISyntaxTriviaList;
 
         public _primaryExpressionBrand: any; public _memberExpressionBrand: any; public _leftHandSideExpressionBrand: any; public _postfixExpressionBrand: any; public _unaryExpressionBrand: any; public _expressionBrand: any; public _typeBrand: any; public _syntaxNodeOrTokenBrand: any;
+        public parent: ISyntaxElement;
 
         constructor(fullStart: number,
             kind: SyntaxKind,
@@ -497,6 +499,7 @@ module TypeScript.Syntax {
 
     class ConvertedKeywordToken implements ISyntaxToken {
         public _primaryExpressionBrand: any; public _memberExpressionBrand: any; public _leftHandSideExpressionBrand: any; public _postfixExpressionBrand: any; public _unaryExpressionBrand: any; public _expressionBrand: any; public _typeBrand: any; public _syntaxNodeOrTokenBrand: any;
+        public parent: ISyntaxElement;
 
         constructor(private underlyingToken: ISyntaxToken) {
         }