diff --git a/src/device/Makefile.inc b/src/device/Makefile.inc
index 7da6ea85d3..6a2d964a67 100644
--- a/src/device/Makefile.inc
+++ b/src/device/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-y += device.c
 ramstage-y += root_device.c
 ramstage-y += cpu_device.c
diff --git a/src/soc/amd/common/block/xhci/Makefile.inc b/src/soc/amd/common/block/xhci/Makefile.inc
index 30f79b73cc..377ca2740a 100644
--- a/src/soc/amd/common/block/xhci/Makefile.inc
+++ b/src/soc/amd/common/block/xhci/Makefile.inc
@@ -1,2 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_XHCI)    += xhci.c
 smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_XHCI_ELOG)    += elog.c
diff --git a/src/soc/intel/common/block/vtd/Makefile.inc b/src/soc/intel/common/block/vtd/Makefile.inc
index 440aaba713..e717f2b8aa 100644
--- a/src/soc/intel/common/block/vtd/Makefile.inc
+++ b/src/soc/intel/common/block/vtd/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 # VT-d will not be functional in bootblock and verstage yet.
 # It will become available after FSP memory init.
 # If coreboot does native VT-d initialization, early DMA protection