diff --git a/usr.bin/bsdiff/Makefile.inc b/usr.bin/bsdiff/Makefile.inc
index 8eff7341fccb..198d906713fd 100644
--- a/usr.bin/bsdiff/Makefile.inc
+++ b/usr.bin/bsdiff/Makefile.inc
@@ -1,3 +1,6 @@
 # $FreeBSD$
 
 WARNS?=	6
+
+.include "../Makefile.inc"
+