4 files changed, 7 insertions, 0 deletions
diff --git a/src/security/intel/Makefile.inc b/src/security/intel/Makefile.inc
index 20aea273e0..25e28ed869 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 4c585b8664..e166634351 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 d4da605bd7..90b7c188f7 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 e19bacfbf5..c1fc0c4527 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)