diff --git a/libnm-core/nm-keyfile.h b/libnm-core/nm-keyfile.h
index 0967d25495..8295c698c8 100644
--- a/libnm-core/nm-keyfile.h
+++ b/libnm-core/nm-keyfile.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: LGPL-2.1+
+/* SPDX-License-Identifier: LGPL-2.1+ */
 
 #ifndef __NM_KEYFILE_H__
 #define __NM_KEYFILE_H__