diff --git a/make/topdir.mk b/make/topdir.mk
index cf34ea4c..bc8d0b0a 100644
--- a/make/topdir.mk
+++ b/make/topdir.mk
@@ -3,7 +3,7 @@ install: topdir.install
 clean: topdir.clean
 config:
 
-SUBDIRS ?= $(wildcard inst/pre make scripts tools src include lib bin \
+SUBDIRS ?= $(wildcard inst/pre make scripts contrib tools src include lib bin \
 	util plugins conf config cfg images doc test inst/post)
 
 ifneq ($(wildcard $(TOPDIR)/make/defs.mk),)