diff --git a/zebra/rtread_proc.c b/zebra/rtread_proc.c
index 93ec238..1de435a 100644
--- a/zebra/rtread_proc.c
+++ b/zebra/rtread_proc.c
@@ -96,7 +96,7 @@
       p.prefixlen = ip_masklen (tmpmask);
       sscanf (gate, "%lX", (unsigned long *)&gateway);
 
-      rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p, &gateway, 0, 0, 0, 0);
+      rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p, &gateway, NULL, 0, 0, 0, 0);
     }
 
   fclose (fp);