1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Basic/Diagnostic.cpp b/lib/Basic/Diagnostic.cpp
index c2631bba3f..4a63d97933 100644
--- a/lib/Basic/Diagnostic.cpp
+++ b/lib/Basic/Diagnostic.cpp
@@ -27,7 +27,7 @@ static void DummyArgToStringFn(DiagnosticsEngine::ArgumentKind AK, intptr_t QT,
                                unsigned NumPrevArgs,
                                SmallVectorImpl<char> &Output,
                                void *Cookie,
-                               SmallVectorImpl<intptr_t> &QualTypeVals) {
+                               ArrayRef<intptr_t> QualTypeVals) {
   const char *Str = "<can't format argument>";
   Output.append(Str, Str+strlen(Str));
 }