diff --git a/firmware/hw_layer/hw_layer.mk b/firmware/hw_layer/hw_layer.mk
index 389569b6cd..0e5268de4e 100644
--- a/firmware/hw_layer/hw_layer.mk
+++ b/firmware/hw_layer/hw_layer.mk
@@ -33,6 +33,8 @@ HW_LAYER_EMS_CPP = $(HW_LAYER_EGT_CPP) \
 	$(PROJECT_DIR)/hw_layer/cdm_ion_sense.cpp \
 	$(PROJECT_DIR)/hw_layer/backup_ram.cpp \
 
-	
+#
+# '-include' is a magic kind of 'include' which would survive if file to be included is not found
+#	
 -include $(PROJECT_DIR)/hw_layer/$(CPU_HWLAYER)/hw_ports.mk
 	
\ No newline at end of file