1 files changed, 5 insertions, 2 deletions
diff --git a/lib/Frontend/FrontendActions.cpp b/lib/Frontend/FrontendActions.cpp
index baaf93b167bc..89ac385ca45d 100644
--- a/lib/Frontend/FrontendActions.cpp
+++ b/lib/Frontend/FrontendActions.cpp
@@ -546,8 +546,11 @@ void PrintPreprocessedAction::ExecuteAction() {
   // module itself before switching to the input buffer.
   auto &Input = getCurrentInput();
   if (Input.getKind().getFormat() == InputKind::ModuleMap) {
-    if (Input.isFile())
-      (*OS) << "# 1 \"" << Input.getFile() << "\"\n";
+    if (Input.isFile()) {
+      (*OS) << "# 1 \"";
+      OS->write_escaped(Input.getFile());
+      (*OS) << "\"\n";
+    }
     // FIXME: Include additional information here so that we don't need the
     // original source files to exist on disk.
     getCurrentModule()->print(*OS);