diff --git a/src/commonlib/Makefile.inc b/src/commonlib/Makefile.inc
index e90ed4f..86e8c56 100644
--- a/src/commonlib/Makefile.inc
+++ b/src/commonlib/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 subdirs-y += storage
 
 bootblock-y += mem_pool.c
diff --git a/src/console/Makefile.inc b/src/console/Makefile.inc
index 4296426..fd98cf7 100644
--- a/src/console/Makefile.inc
+++ b/src/console/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-y += vtxprintf.c printk.c vsprintf.c
 ramstage-y += init.c console.c
 ramstage-y += post.c
diff --git a/src/device/dram/Makefile.inc b/src/device/dram/Makefile.inc
index fc472ea..eb2e629 100644
--- a/src/device/dram/Makefile.inc
+++ b/src/device/dram/Makefile.inc
@@ -1,3 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
 
 romstage-y += ddr_common.c
 ramstage-y += ddr_common.c spd.c
diff --git a/src/northbridge/intel/e7505/Makefile.inc b/src/northbridge/intel/e7505/Makefile.inc
index 29ac437..44a056b 100644
--- a/src/northbridge/intel/e7505/Makefile.inc
+++ b/src/northbridge/intel/e7505/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ifeq ($(CONFIG_NORTHBRIDGE_INTEL_E7505),y)
 
 ramstage-y += northbridge.c
diff --git a/src/security/Makefile.inc b/src/security/Makefile.inc
index 72b87db..b7922d4 100644
--- a/src/security/Makefile.inc
+++ b/src/security/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 subdirs-y += vboot
 subdirs-y += tpm
 subdirs-y += memory
diff --git a/src/security/intel/Makefile.inc b/src/security/intel/Makefile.inc
index 20aea27..25e28ed 100644
--- a/src/security/intel/Makefile.inc
+++ b/src/security/intel/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 subdirs-y += txt
 subdirs-y += stm
 subdirs-y += cbnt
diff --git a/src/security/intel/cbnt/Makefile.inc b/src/security/intel/cbnt/Makefile.inc
index 4c585b8..e166634 100644
--- a/src/security/intel/cbnt/Makefile.inc
+++ b/src/security/intel/cbnt/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ifeq ($(CONFIG_INTEL_CBNT_SUPPORT),y)
 
 all-y += logging.c
diff --git a/src/security/intel/stm/Makefile.inc b/src/security/intel/stm/Makefile.inc
index d4da605..90b7c18 100644
--- a/src/security/intel/stm/Makefile.inc
+++ b/src/security/intel/stm/Makefile.inc
@@ -1,3 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
 
 # put the stm where it can be found
 
diff --git a/src/security/intel/txt/Makefile.inc b/src/security/intel/txt/Makefile.inc
index e19bacf..c1fc0c4 100644
--- a/src/security/intel/txt/Makefile.inc
+++ b/src/security/intel/txt/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 romstage-$(CONFIG_INTEL_TXT_LIB) += txtlib.c
 
 ifeq ($(CONFIG_INTEL_TXT),y)
diff --git a/src/security/memory/Makefile.inc b/src/security/memory/Makefile.inc
index 0882ca3..4f07bbb 100644
--- a/src/security/memory/Makefile.inc
+++ b/src/security/memory/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 romstage-$(CONFIG_PLATFORM_HAS_DRAM_CLEAR) += memory.c
 postcar-$(CONFIG_PLATFORM_HAS_DRAM_CLEAR) += memory.c
 ramstage-$(CONFIG_PLATFORM_HAS_DRAM_CLEAR) += memory.c
diff --git a/src/security/tpm/Makefile.inc b/src/security/tpm/Makefile.inc
index ae06cb0..ade9656 100644
--- a/src/security/tpm/Makefile.inc
+++ b/src/security/tpm/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 subdirs-$(CONFIG_TPM_GOOGLE) += tss/vendor/cr50
 
 ## TSS
diff --git a/src/security/tpm/tss/vendor/cr50/Makefile.inc b/src/security/tpm/tss/vendor/cr50/Makefile.inc
index 8bacafd..0a16fa1 100644
--- a/src/security/tpm/tss/vendor/cr50/Makefile.inc
+++ b/src/security/tpm/tss/vendor/cr50/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-y += cr50.c
 romstage-y += cr50.c
 postcar-y += cr50.c
diff --git a/src/southbridge/amd/common/Makefile.inc b/src/southbridge/amd/common/Makefile.inc
index e086dc3..ce8b3d4 100644
--- a/src/southbridge/amd/common/Makefile.inc
+++ b/src/southbridge/amd/common/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_SOUTHBRIDGE_AMD_PI_AVALON) += amd_pci_util.c
diff --git a/src/southbridge/intel/i82870/Makefile.inc b/src/southbridge/intel/i82870/Makefile.inc
index d6ae171..83ebca5 100644
--- a/src/southbridge/intel/i82870/Makefile.inc
+++ b/src/southbridge/intel/i82870/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_I82870),y)
 
 ramstage-y += ioapic.c
diff --git a/src/southbridge/ricoh/rl5c476/Makefile.inc b/src/southbridge/ricoh/rl5c476/Makefile.inc
index 3fa232f..24e84d2 100644
--- a/src/southbridge/ricoh/rl5c476/Makefile.inc
+++ b/src/southbridge/ricoh/rl5c476/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ifeq ($(CONFIG_SOUTHBRIDGE_RICOH_RL5C476),y)
 
 ramstage-y += rl5c476.c
diff --git a/src/southbridge/ti/pci1x2x/Makefile.inc b/src/southbridge/ti/pci1x2x/Makefile.inc
index 4f2a3d3..05e57ad 100644
--- a/src/southbridge/ti/pci1x2x/Makefile.inc
+++ b/src/southbridge/ti/pci1x2x/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ifeq ($(CONFIG_SOUTHBRIDGE_TI_PCI1X2X),y)
 
 ramstage-y += pci1x2x.c