diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index e43c78a28971..2fcf3acff223 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -1808,6 +1808,8 @@ addaliasu(nvp, nvp_rdev)
 	if (nvp->v_type != VCHR)
 		panic("addaliasu on non-special vnode");
 	dev = udev2dev(nvp_rdev);
+	if (dev == NODEV)
+		return (nvp);
 	/*
 	 * Check to see if we have a bdevvp vnode with no associated
 	 * filesystem. If so, we want to associate the filesystem of