1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index fd57bbc237..bd7c8515f6 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -1026,6 +1026,9 @@ LambdaScopeInfo *Sema::getCurLambda() {
 }
 
 void Sema::ActOnComment(SourceRange Comment) {
+  if (!LangOpts.RetainCommentsFromSystemHeaders &&
+      SourceMgr.isInSystemHeader(Comment.getBegin()))
+    return;
   RawComment RC(SourceMgr, Comment);
   if (RC.isAlmostTrailingComment()) {
     SourceRange MagicMarkerRange(Comment.getBegin(),