diff --git a/src/BizHawk.Client.Common/movie/MovieConversionExtensions.cs b/src/BizHawk.Client.Common/movie/MovieConversionExtensions.cs
index 16ae2d0228..65794a0b47 100644
--- a/src/BizHawk.Client.Common/movie/MovieConversionExtensions.cs
+++ b/src/BizHawk.Client.Common/movie/MovieConversionExtensions.cs
@@ -1,4 +1,4 @@
-using System;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 
@@ -28,7 +28,7 @@ namespace BizHawk.Client.Common
 			foreach (var (k, v) in old.HeaderEntries) tas.HeaderEntries[k] = v;
 
 			// TODO: we have this version number string generated in multiple places
-			tas.HeaderEntries[HeaderKeys.MovieVersion] = $"BizHawk v2.0 Tasproj v{TasMovie.CurrentVersion}";
+			tas.HeaderEntries[HeaderKeys.MovieVersion] = $"BizHawk v2.0 Tasproj v{TasMovie.CurrentVersion.ToString(NumberFormatInfo.InvariantInfo)}";
 
 			tas.SyncSettingsJson = old.SyncSettingsJson;