diff --git a/package/base/iproute2/rocknet_iproute2.sh b/package/base/iproute2/rocknet_iproute2.sh
index 2cfd07282..ef4274abd 100644
--- a/package/base/iproute2/rocknet_iproute2.sh
+++ b/package/base/iproute2/rocknet_iproute2.sh
@@ -8,7 +8,7 @@ iproute2_init_if() {
 }
 
 public_ip() {
-	addcode up 5 5 "ip addr add $1 dev $if"
+	addcode up 5 5 "ip addr add $1 broadcast + dev $if"
 	iproute2_init_if
 }