diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.IToolForm.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.IToolForm.cs
index c578db81b0..6adaf5cfe5 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.IToolForm.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.IToolForm.cs
@@ -25,6 +25,7 @@ namespace BizHawk.Client.EmuHawk
 				return;
 			}
 
+			TasView.RowCount = _currentTasMovie.InputLogLength + 1;
 			SetVisibleIndex();
 		}