diff --git a/net/wireguard/src/opnsense/service/templates/OPNsense/Wireguard/wireguard-server.conf b/net/wireguard/src/opnsense/service/templates/OPNsense/Wireguard/wireguard-server.conf
index f3452f629..0d07a5ff3 100644
--- a/net/wireguard/src/opnsense/service/templates/OPNsense/Wireguard/wireguard-server.conf
+++ b/net/wireguard/src/opnsense/service/templates/OPNsense/Wireguard/wireguard-server.conf
@@ -18,8 +18,8 @@ PrivateKey = {{ server_list.privkey }}
 Table = off
 {%         endif %}
 {%         if server_list.disableroutes == '1' and server_list.gateway|default('') != '' %}
-PostUp = route add {{ server_list.gateway }} -iface %i
-PostDown = route del {{ server_list.gateway }} -iface %i
+PostUp = route {{- ' -6' if ':' in server_list.gateway }} add {{ server_list.gateway }} -iface %i
+PostDown = route {{- ' -6' if ':' in server_list.gateway }} del {{ server_list.gateway }} -iface %i
 {%         endif %}
 {%         if server_list.peers|default('') != '' %}
 {%           for peerlist in server_list.peers.split(",") %}