diff --git a/clang/Driver/PrintParserCallbacks.cpp b/clang/Driver/PrintParserCallbacks.cpp
index 43dbf34..996051a 100644
--- a/clang/Driver/PrintParserCallbacks.cpp
+++ b/clang/Driver/PrintParserCallbacks.cpp
@@ -496,7 +496,8 @@
       return 0;
     }
   
-    virtual ExprResult ActOnBinOp(SourceLocation TokLoc, tok::TokenKind Kind,
+    virtual ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 
+                                  tok::TokenKind Kind,
                                   ExprTy *LHS, ExprTy *RHS) {
       llvm::cout << __FUNCTION__ << "\n";
       return 0;