diff --git a/src/soc/intel/skylake/Makefile.inc b/src/soc/intel/skylake/Makefile.inc
index 162b343ae2..732a98ad6c 100644
--- a/src/soc/intel/skylake/Makefile.inc
+++ b/src/soc/intel/skylake/Makefile.inc
@@ -109,7 +109,8 @@ endif
 CPPFLAGS_common += -I$(src)/soc/intel/skylake
 CPPFLAGS_common += -I$(src)/soc/intel/skylake/include
 
-# Currently used for microcode path.
+ifeq ($(CONFIG_BOARD_STARLABS_STARBOOK_ADL) $(CONFIG_BOARD_STARLABS_LABTOP_CML) $(CONFIG_BOARD_STARLABS_STARBOOK_TGL) $(CONFIG_BOARD_OCP_TIOGAPASS),y)
 CPPFLAGS_common += -I3rdparty/blobs/mainboard/$(MAINBOARDDIR)
+endif
 
 endif