1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Frontend/FrontendAction.cpp b/lib/Frontend/FrontendAction.cpp
index a4321e720e..ca8511247a 100644
--- a/lib/Frontend/FrontendAction.cpp
+++ b/lib/Frontend/FrontendAction.cpp
@@ -247,7 +247,9 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
       goto failure;
 
     CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
-
+    CI.getPreprocessor().setPPMutationListener(
+      Consumer->GetPPMutationListener());
+    
     if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
       // Convert headers to PCH and chain them.
       OwningPtr<ExternalASTSource> source;