diff --git a/conf.d/Makefile b/conf.d/Makefile
index 96b0a6eb..c874bae1 100644
--- a/conf.d/Makefile
+++ b/conf.d/Makefile
@@ -2,4 +2,6 @@ DIR=	${CONFDIR}
 CONF=	bootmisc fsck hostname local net urandom
 
 MK=	../mk
+include ${MK}/os.mk
+include Makefile.${OS}
 include ${MK}/scripts.mk