diff --git a/drivers/bios_emulator/Makefile b/drivers/bios_emulator/Makefile
index 2ba43ac..0a28074 100644
--- a/drivers/bios_emulator/Makefile
+++ b/drivers/bios_emulator/Makefile
@@ -1,3 +1,7 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
 X86DIR  = x86emu
 
 obj-y = atibios.o biosemu.o besys.o bios.o \