diff --git a/package/network/config/firewall/files/firewall.config b/package/network/config/firewall/files/firewall.config
index ba7e4ec0b3..749dbecb97 100644
--- a/package/network/config/firewall/files/firewall.config
+++ b/package/network/config/firewall/files/firewall.config
@@ -59,8 +59,8 @@ config rule
 	option name		Allow-DHCPv6
 	option src		wan
 	option proto		udp
-	option src_ip		fe80::/10
-	option dest_ip		fe80::/10
+	option src_ip		fc00::/6
+	option dest_ip		fc00::/6
 	option dest_port	546
 	option family		ipv6
 	option target		ACCEPT