diff --git a/Mirror/Weaver/MessageClassProcessor.cs b/Mirror/Weaver/MessageClassProcessor.cs
index b0d450768..b4ea8caa0 100644
--- a/Mirror/Weaver/MessageClassProcessor.cs
+++ b/Mirror/Weaver/MessageClassProcessor.cs
@@ -1,4 +1,4 @@
-using System;
+// this class generates OnSerialize/OnDeserialize when inheriting from MessageBase
 using Mono.Cecil;
 using Mono.Cecil.Cil;