diff --git a/src/BizHawk.Client.Common/rewind/Zwinder.cs b/src/BizHawk.Client.Common/rewind/Zwinder.cs
index 2c131b37ba..44b7d7ff40 100644
--- a/src/BizHawk.Client.Common/rewind/Zwinder.cs
+++ b/src/BizHawk.Client.Common/rewind/Zwinder.cs
@@ -1,6 +1,4 @@
-using System;
 using System.IO;
-using System.IO.Compression;
 using BizHawk.Emulation.Common;
 
 namespace BizHawk.Client.Common