diff --git a/src/soc/intel/elkhartlake/Kconfig b/src/soc/intel/elkhartlake/Kconfig
index 3361c0d..13fa925 100644
--- a/src/soc/intel/elkhartlake/Kconfig
+++ b/src/soc/intel/elkhartlake/Kconfig
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 config SOC_INTEL_ELKHARTLAKE
 	bool
 	select ACPI_INTEL_HARDWARE_SLEEP_VALUES