diff --git a/src/openvpn/route.c b/src/openvpn/route.c
index 2905e432..fd1125ef 100644
--- a/src/openvpn/route.c
+++ b/src/openvpn/route.c
@@ -3360,7 +3360,7 @@ get_default_gateway_ipv6(struct route_ipv6_gateway_info *rgi6,
     if (net_route_v6_best_gw(ctx, dest, &rgi6->gateway.addr_ipv6,
                              rgi6->iface) == 0)
     {
-        if (!IN6_IS_ADDR_UNSPECIFIED(rgi6->gateway.addr_ipv6.s6_addr))
+        if (!IN6_IS_ADDR_UNSPECIFIED(&rgi6->gateway.addr_ipv6))
         {
             rgi6->flags |= RGI_ADDR_DEFINED;
         }