diff --git a/clang/lib/Frontend/PrintParserCallbacks.cpp b/clang/lib/Frontend/PrintParserCallbacks.cpp
index 6af33c2..8d64a64 100644
--- a/clang/lib/Frontend/PrintParserCallbacks.cpp
+++ b/clang/lib/Frontend/PrintParserCallbacks.cpp
@@ -684,7 +684,8 @@
 
     virtual DeclPtrTy ActOnStartNamespaceDef(Scope *S, SourceLocation IdentLoc,
                                              IdentifierInfo *Ident,
-                                             SourceLocation LBrace) {
+                                             SourceLocation LBrace,
+                                             AttributeList *AttrList) {
       Out << __FUNCTION__ << "\n";
       return DeclPtrTy();
     }