diff --git a/src/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs b/src/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs
index 02fbd23fb9..3c3bad05f9 100644
--- a/src/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs
+++ b/src/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs
@@ -296,7 +296,7 @@ namespace BizHawk.Client.EmuHawk
 
 		/// <returns><paramref name="index"/> with leading zeroes such that every frame in the movie will be printed with the same number of digits</returns>
 		private string FrameToStringPadded(int index)
-			=> index.ToString(_formatCache[(int)Math.Log10(Math.Max(CurrentTasMovie.InputLogLength, 1))]);
+			=> index.ToString(_formatCache[NumberExtensions.Log10(Math.Max(CurrentTasMovie.InputLogLength, 1))]);
 
 		private void TasView_QueryItemText(int index, RollColumn column, out string text, ref int offsetX, ref int offsetY)
 		{
diff --git a/src/BizHawk.Common/Extensions/NumberExtensions.cs b/src/BizHawk.Common/Extensions/NumberExtensions.cs
index b7f0f0bb6f..8dad23a325 100644
--- a/src/BizHawk.Common/Extensions/NumberExtensions.cs
+++ b/src/BizHawk.Common/Extensions/NumberExtensions.cs
@@ -127,6 +127,17 @@ namespace BizHawk.Common.NumberExtensions
 			}
 		}
 
+		public static int Log10(int i)
+		{
+			var toReturn = 0;
+			while (i > 100)
+			{
+				i /= 100;
+				toReturn += 2;
+			}
+			return i > 10 ? toReturn + 1 : toReturn;
+		}
+
 		/// <summary>
 		/// Receives a number and returns the number of hexadecimal digits it is
 		/// Note: currently only returns 2, 4, 6, or 8