diff --git a/src/etc/inc/interfaces.inc b/src/etc/inc/interfaces.inc
index 343180525..f3e823be6 100644
--- a/src/etc/inc/interfaces.inc
+++ b/src/etc/inc/interfaces.inc
@@ -2738,7 +2738,8 @@ function interface_6rd_configure($interface = 'wan', $wancfg)
     file_put_contents("/tmp/{$stfiface}_routerv6", "{$rd6brgw}\n");
     file_put_contents("/tmp/{$stfiface}_defaultgwv6", "{$rd6brgw}\n");
 
-    $ip4gateway = get_interface_gateway($interface);
+    $gateways = new \OPNsense\Routing\Gateways(legacy_interfaces_details());
+    $ip4gateway = $gateways->getInterfaceGateway($interface, "inet");
     if (is_ipaddrv4($ip4gateway)) {
         system_host_route($wancfg['gateway-6rd'], $ip4gateway);
     }