diff --git a/arch/s390/lib/Makefile b/arch/s390/lib/Makefile
index 1d1af31..9bfe080 100644
--- a/arch/s390/lib/Makefile
+++ b/arch/s390/lib/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for s390-specific library files..
 #