diff --git a/flang/include/flang/Runtime/allocatable.h b/flang/include/flang/Runtime/allocatable.h
--- a/flang/include/flang/Runtime/allocatable.h
+++ b/flang/include/flang/Runtime/allocatable.h
@@ -1,4 +1,4 @@
-//===-- include/flang/Runtime/allocatable.h ----------------
+//===-- include/flang/Runtime/allocatable.h ---------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
diff --git a/flang/include/flang/Runtime/entry-names.h b/flang/include/flang/Runtime/entry-names.h
--- a/flang/include/flang/Runtime/entry-names.h
+++ b/flang/include/flang/Runtime/entry-names.h
@@ -1,4 +1,4 @@
-/*===-- include/flang/Runtime/entry-names.h -------------------------*- C -*-===
+/*===-- include/flang/Runtime/entry-names.h -------------------------*- C -*-=//
  *
  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  * See https://llvm.org/LICENSE.txt for license information.