diff --git a/lib/libsmb/Makefile b/lib/libsmb/Makefile
index f13595c6d27c..5d4b3e27a552 100644
--- a/lib/libsmb/Makefile
+++ b/lib/libsmb/Makefile
@@ -12,7 +12,7 @@ SRCS=	rcfile.c ctx.c cfopt.c subr.c nls.c rap.c mbuf.c rq.c file.c \
 	kiconv.c \
 	nb.c nb_name.c nb_net.c nbns_rq.c
 CONTRIBDIR=	${.CURDIR}/../../contrib/smbfs
-CFLAGS+=	-I${CONTRIBDIR}/include
+CFLAGS+=	-DSMB_CFG_FILE=\"/etc/nsmb.conf\" -I${CONTRIBDIR}/include
 
 .PATH:	${CONTRIBDIR}/lib/smb