diff --git a/sys/kern/uipc_usrreq.c b/sys/kern/uipc_usrreq.c
index 1f9ca3d2007..f6a5ea23e99 100644
--- a/sys/kern/uipc_usrreq.c
+++ b/sys/kern/uipc_usrreq.c
@@ -1095,9 +1095,9 @@ unp_init(void)
 {
 	unp_zone = uma_zcreate("unpcb", sizeof(struct unpcb), NULL, NULL,
 	    NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
-	uma_zone_set_max(unp_zone, nmbclusters);
 	if (unp_zone == 0)
 		panic("unp_init");
+	uma_zone_set_max(unp_zone, nmbclusters);
 	LIST_INIT(&unp_dhead);
 	LIST_INIT(&unp_shead);
 }