diff --git a/RombaSharp/Features/Diffdat.cs b/RombaSharp/Features/Diffdat.cs
index 40a8611e..74dd5db7 100644
--- a/RombaSharp/Features/Diffdat.cs
+++ b/RombaSharp/Features/Diffdat.cs
@@ -68,7 +68,7 @@ in -old DAT file. Ignores those entries in -old that are not in -new.";
 
             // Now run the diff on the inputs
             datfile.DetermineUpdateType(dats, basedats, outdat, UpdateMode.DiffAgainst, false /* inplace */, false /* skip */,
-                new Filter(), new List<Field>(), false /* onlySame */);
+                new Filter(), new List<Field>(), false /* onlySame */, false /* byGame */);
         }
     }
 }
diff --git a/RombaSharp/Features/EDiffdat.cs b/RombaSharp/Features/EDiffdat.cs
index dcf3221b..f2f4e535 100644
--- a/RombaSharp/Features/EDiffdat.cs
+++ b/RombaSharp/Features/EDiffdat.cs
@@ -61,7 +61,7 @@ namespace RombaSharp.Features
 
             // Now run the diff on the inputs
             datfile.DetermineUpdateType(dats, basedats, outdat, UpdateMode.DiffAgainst, false /* inplace */, false /* skip */,
-                new Filter(), new List<Field>(), false /* onlySame */);
+                new Filter(), new List<Field>(), false /* onlySame */, false /* byGame */);
         }
     }
 }
diff --git a/SabreTools.Library/DatFiles/DatFile.cs b/SabreTools.Library/DatFiles/DatFile.cs
index 96c2653d..fffd738b 100644
--- a/SabreTools.Library/DatFiles/DatFile.cs
+++ b/SabreTools.Library/DatFiles/DatFile.cs
@@ -191,6 +191,7 @@ namespace SabreTools.Library.DatFiles
 
         #endregion
 
+        // TODO: Move to features?
         #region Determination Helpers
 
         /// <summary>