diff --git a/proxy/wireguard/tun_linux.go b/proxy/wireguard/tun_linux.go
index 88446339fc6f..0f083e8d276a 100644
--- a/proxy/wireguard/tun_linux.go
+++ b/proxy/wireguard/tun_linux.go
@@ -199,6 +199,8 @@ func createKernelTun(localAddresses []netip.Addr, mtu int, handler promiscuousMo
 
 		r := netlink.NewRule()
 		r.Table, r.Family, r.Src = ipv6TableIndex, unix.AF_INET6, addr.IPNet
+		r = netlink.NewRule()
+		r.Table, r.Family, r.OifName = ipv6TableIndex, unix.AF_INET6, n
 		out.rules = append(out.rules, r)
 	}