diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 13a0e85..96db4a4 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -232,6 +232,10 @@
   /// BlockScopes - Map of which "cleanup scope" scope basic blocks have.
   BlockScopeMap BlockScopes;
 
+  /// CXXThisDecl - When parsing an C++ function, this will hold the implicit
+  /// 'this' declaration.
+  ImplicitParamDecl *CXXThisDecl;
+  
 public:
   CodeGenFunction(CodeGenModule &cgm);