1 files changed, 3 insertions, 1 deletions
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 2233a1125e..de56b19931 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -2464,7 +2464,8 @@ CXTranslationUnit clang_createTranslationUnit(CXIndex CIdx,
                                   CXXIdx->getOnlyLocalDecls(),
                                   0, 0,
                                   /*CaptureDiagnostics=*/true,
-                                  /*AllowPCHWithCompilerErrors=*/true);
+                                  /*AllowPCHWithCompilerErrors=*/true,
+                                  /*UserFilesAreVolatile=*/true);
   return MakeCXTranslationUnit(CXXIdx, TU);
 }
 
@@ -2612,6 +2613,7 @@ static void clang_parseTranslationUnit_Impl(void *UserData) {
                                  IncludeBriefCommentsInCodeCompletion,
                                  /*AllowPCHWithCompilerErrors=*/true,
                                  SkipFunctionBodies,
+                                 /*UserFilesAreVolatile=*/true,
                                  &ErrUnit));
 
   if (NumErrors != Diags->getClient()->getNumErrors()) {