diff --git a/sys/conf/kern.post.mk b/sys/conf/kern.post.mk
index 371049380a0..99d2ff5a3b7 100644
--- a/sys/conf/kern.post.mk
+++ b/sys/conf/kern.post.mk
@@ -14,6 +14,7 @@
 
 clean:  kernel-clean
 cleandepend:  kernel-cleandepend
+cleandir:
 clobber: kernel-clobber
 depend: kernel-depend
 install: kernel-install