diff --git a/v2rayN/v2rayN/Tool/Utils.cs b/v2rayN/v2rayN/Tool/Utils.cs
index 3256d38b..43359be6 100644
--- a/v2rayN/v2rayN/Tool/Utils.cs
+++ b/v2rayN/v2rayN/Tool/Utils.cs
@@ -204,7 +204,7 @@ namespace v2rayN
                 }
                 else
                 {
-                    return string.Join(",", lst);
+                    return string.Join(",", lst.ToArray());
                 }
             }
             catch (Exception ex)