diff --git a/include/llvm/IR/TrackingMDRef.h b/include/llvm/IR/TrackingMDRef.h
index ea621c1d95e..e24112154e1 100644
--- a/include/llvm/IR/TrackingMDRef.h
+++ b/include/llvm/IR/TrackingMDRef.h
@@ -1,4 +1,4 @@
-//===- llvm/IR/TrackingMDRef.h - Tracking Metadata references -------------===//
+//===- llvm/IR/TrackingMDRef.h - Tracking Metadata references ---*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //