Index: sys/fs/fuse/fuse_vfsops.c
===================================================================
--- sys/fs/fuse/fuse_vfsops.c	(revision 241227)
+++ sys/fs/fuse/fuse_vfsops.c	(working copy)
@@ -442,8 +442,10 @@ fuse_vfsop_root(struct mount *mp, int lkflags, str
 
 	if (data->vroot != NULL) {
 		err = vget(data->vroot, lkflags, curthread);
-		if (err == 0)
+		if (err == 0) {
+			MPASS(data->vroot->v_type != VNON);
 			*vpp = data->vroot;
+		}
 	} else {
 		err = fuse_vnode_get(mp, FUSE_ROOT_ID, NULL, vpp, NULL, VDIR);
 		if (err == 0) {