diff --git a/fmt/Bean2CoreObj_box.cpp b/fmt/Bean2CoreObj_box.cpp
index 021fa43..a739007 100644
--- a/fmt/Bean2CoreObj_box.cpp
+++ b/fmt/Bean2CoreObj_box.cpp
@@ -69,11 +69,9 @@ namespace NekoGui_fmt {
             outbound->insert("tls", tls);
         }
 
-        if (!packet_encoding.isEmpty()) {
-            auto pkt = packet_encoding;
-            if (pkt == "packet") pkt = "packetaddr";
-            outbound->insert("packet_encoding", pkt);
-        }
+        auto pkt = packet_encoding;
+        if (pkt == "packet") pkt = "packetaddr";
+        outbound->insert("packet_encoding", pkt);
     }
 
     CoreObjOutboundBuildResult SocksHttpBean::BuildCoreObjSingBox() {
diff --git a/sub/GroupUpdater.cpp b/sub/GroupUpdater.cpp
index 1fe0070..fe09d6b 100644
--- a/sub/GroupUpdater.cpp
+++ b/sub/GroupUpdater.cpp
@@ -270,6 +270,13 @@ namespace NekoGui_sub {
                     if (type == "vless") {
                         bean->flow = Node2QString(proxy["flow"]);
                         bean->password = Node2QString(proxy["uuid"]);
+                        // meta vless xudp
+                        auto xudp = proxy["xudp"];
+                        if (xudp.IsDefined() && !xudp.IsNull() && Node2Bool(xudp) == false) {
+                            bean->stream->packet_encoding = "";
+                        } else {
+                            bean->stream->packet_encoding = "xudp";
+                        }
                     } else {
                         bean->password = Node2QString(proxy["password"]);
                     }