diff --git a/utils/TableGen/DAGISelMatcher.h b/utils/TableGen/DAGISelMatcher.h
index 7440304931b4..b9cb267a8ca0 100644
--- a/utils/TableGen/DAGISelMatcher.h
+++ b/utils/TableGen/DAGISelMatcher.h
@@ -1,4 +1,4 @@
-//===- DAGISelMatcher.h - Representation of DAG pattern matcher -----------===//
+//===- DAGISelMatcher.h - Representation of DAG pattern matcher -*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //