diff --git a/usr.bin/lsvfs/Makefile b/usr.bin/lsvfs/Makefile
index b2b06113e666..34cc78b4b011 100644
--- a/usr.bin/lsvfs/Makefile
+++ b/usr.bin/lsvfs/Makefile
@@ -1,4 +1,5 @@
 # $FreeBSD$
 PROG=	lsvfs
+WARNS?=	2
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/lsvfs/lsvfs.c b/usr.bin/lsvfs/lsvfs.c
index cb6a032e634b..0b53a2dee67d 100644
--- a/usr.bin/lsvfs/lsvfs.c
+++ b/usr.bin/lsvfs/lsvfs.c
@@ -44,7 +44,7 @@ main(int argc, char **argv)
       }
     }
   } else {
-    while (ovfcp = getvfsent()) {
+    while ((ovfcp = getvfsent()) != NULL) {
       printf(FMT, ovfcp->vfc_name, ovfcp->vfc_refcount,
              fmt_flags(ovfcp->vfc_flags));
     }