diff --git a/Driver/TextDiagnostics.cpp b/Driver/TextDiagnostics.cpp
index 5b14cdd..46e535d 100644
--- a/Driver/TextDiagnostics.cpp
+++ b/Driver/TextDiagnostics.cpp
@@ -40,7 +40,8 @@
 }
 
 bool TextDiagnostics::IgnoreDiagnostic(Diagnostic::Level Level,
-                                       SourceLocation Pos) {
+                                       SourceLocation Pos,
+                                       SourceManager& SourceMgr) {
   if (Pos.isValid()) {
     // If this is a warning or note, and if it a system header, suppress the
     // diagnostic.