diff --git a/clang/include/clang/Basic/PartialDiagnostic.h b/clang/include/clang/Basic/PartialDiagnostic.h
index bb55b626b75f..8ae3b22b0cc8 100644
--- a/clang/include/clang/Basic/PartialDiagnostic.h
+++ b/clang/include/clang/Basic/PartialDiagnostic.h
@@ -92,6 +92,7 @@ public:
 
       Storage *Result = FreeList[--NumFreeListEntries];
       Result->NumDiagArgs = 0;
+      Result->DiagRanges.clear();
       Result->FixItHints.clear();
       return Result;
     }