diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 815d2b23e51..8f48008b641 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -394,6 +394,7 @@ module ts {
 
     // SyntaxKind.VariableDeclaration
     export interface VariableDeclaration extends Declaration {
+        parent?: VariableDeclarationList;
         name: Identifier | BindingPattern;  // Declared variable name
         type?: TypeNode;                    // Optional type annotation
         initializer?: Expression;           // Optional initializer