diff --git a/shared/nm-version-macros.h.in b/shared/nm-version-macros.h.in
index 354827b69f..3d5d050027 100644
--- a/shared/nm-version-macros.h.in
+++ b/shared/nm-version-macros.h.in
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: LGPL-2.1+
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /*
  * Copyright (C) 2011, 2015 Red Hat, Inc.
  */