diff --git a/make/install-files.mk b/make/install-files.mk
index 39e5ee03..ff8042a5 100644
--- a/make/install-files.mk
+++ b/make/install-files.mk
@@ -4,6 +4,8 @@ TARGET_MODE  ?= 440
 TARGET_OWNER ?= root
 TARGET_GROUP ?= root
 
+include $(MODDIR)/make/defs.mk
+
 all:
 install: install.done
 clean: done.clean