diff --git a/lib/Frontend/PrintParserCallbacks.cpp b/lib/Frontend/PrintParserCallbacks.cpp
index f02d5d4..b9fe068 100644
--- a/lib/Frontend/PrintParserCallbacks.cpp
+++ b/lib/Frontend/PrintParserCallbacks.cpp
@@ -220,6 +220,7 @@
     }
   
     virtual DeclPtrTy ActOnIvar(Scope *S, SourceLocation DeclStart,
+                                DeclPtrTy IntfDecl,
                                 Declarator &D, ExprTy *BitfieldWidth,
                                 tok::ObjCKeywordKind visibility) {
       Out << __FUNCTION__ << "\n";