diff --git a/BizHawk.Client.Common/rewind/Rewinder.cs b/BizHawk.Client.Common/rewind/Rewinder.cs
index 0370e35f61..d1d6092bf3 100644
--- a/BizHawk.Client.Common/rewind/Rewinder.cs
+++ b/BizHawk.Client.Common/rewind/Rewinder.cs
@@ -69,7 +69,7 @@ namespace BizHawk.Client.Common
 
 			if (RewindActive)
 			{
-				var capacity = Global.Config.Rewind.BufferSize * 1048576L;
+				var capacity = Global.Config.Rewind.BufferSize * (long)(1024 * 1024);
 				_rewindBuffer = new StreamBlobDatabase(Global.Config.Rewind.OnDisk, capacity, BufferManage);
 
 				_rewindThread = new RewindThreader(CaptureInternal, RewindInternal, Global.Config.Rewind.IsThreaded);