diff --git a/src/BizHawk.Client.Common/movie/tasproj/TasMovie.IO.cs b/src/BizHawk.Client.Common/movie/tasproj/TasMovie.IO.cs
index e43b60a718..a8c4951729 100644
--- a/src/BizHawk.Client.Common/movie/tasproj/TasMovie.IO.cs
+++ b/src/BizHawk.Client.Common/movie/tasproj/TasMovie.IO.cs
@@ -20,6 +20,8 @@ namespace BizHawk.Client.Common
 
 		private void AddTasProjLumps(ZipStateSaver bs, bool isBackup = false)
 		{
+			// at this point, TasStateManager may be null if we're currently importing a .bk2
+
 			var settings = JsonConvert.SerializeObject(TasStateManager?.Settings ?? Session.Settings.DefaultTasStateManagerSettings);
 			bs.PutLump(BinaryStateLump.StateHistorySettings, tw => tw.WriteLine(settings));
 			bs.PutLump(BinaryStateLump.LagLog, tw => LagLog.Save(tw));