diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c
index a304d29560f..9dedcbe2c2b 100644
--- a/sys/kern/vfs_vnops.c
+++ b/sys/kern/vfs_vnops.c
@@ -669,6 +669,8 @@ filt_vnattach(struct knote *kn)
 	    kn->kn_fp->f_type != DTYPE_FIFO)
 		return (EBADF);
 
+	vp = (struct vnode *)kn->kn_fp->f_data;
+
 	/*
 	 * XXX
 	 * this is a hack simply to cause the filter attach to fail
@@ -677,8 +679,6 @@ filt_vnattach(struct knote *kn)
 	if ((vp)->v_tag != VT_UFS)
 		return (EOPNOTSUPP);
 
-	vp = (struct vnode *)kn->kn_fp->f_data;
-
         simple_lock(&vp->v_pollinfo.vpi_lock);
 	SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext);
         simple_unlock(&vp->v_pollinfo.vpi_lock);