diff --git a/lib/Frontend/PrintParserCallbacks.cpp b/lib/Frontend/PrintParserCallbacks.cpp
index c933a2f..2101a85 100644
--- a/lib/Frontend/PrintParserCallbacks.cpp
+++ b/lib/Frontend/PrintParserCallbacks.cpp
@@ -574,8 +574,9 @@
       Out << __FUNCTION__ << "\n";
       return ExprEmpty();
     }
-    virtual OwningExprResult ActOnCastExpr(SourceLocation LParenLoc, TypeTy *Ty,
-                                           SourceLocation RParenLoc,ExprArg Op){
+    virtual OwningExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 
+                                           TypeTy *Ty, SourceLocation RParenLoc,
+                                           ExprArg Op) {
       Out << __FUNCTION__ << "\n";
       return ExprEmpty();
     }