diff --git a/TagTool/Commands/Porting/PortTagCommand.PortingOptions.cs b/TagTool/Commands/Porting/PortTagCommand.PortingOptions.cs
index fcdeab0d..ab460769 100644
--- a/TagTool/Commands/Porting/PortTagCommand.PortingOptions.cs
+++ b/TagTool/Commands/Porting/PortTagCommand.PortingOptions.cs
@@ -137,9 +137,12 @@ public enum PortingFlags
 
 			[PortingFlagDescription("Auto rescale gui during porting")]
 			AutoRescaleGui = 1 << 20,
+			
+			[PortingFlagDescription("Auto Update map files")]
+			UpdateMapFiles = 1 << 21,
 
 			// No [PortingFlagDescription] here means we'll flag names as the description.
-			Default = Print | Recursive | Merge | Scripts | Squads | ForgePalette | Elites | Audio | Dialogue | MatchShaders | GenerateShaders
+			Default = Print | Recursive | Merge | Scripts | Squads | ForgePalette | Elites | Audio | Dialogue | MatchShaders | GenerateShaders | UpdateMapFiles
 		}
 
 		/// <summary>
diff --git a/TagTool/Commands/Porting/PortTagCommand.cs b/TagTool/Commands/Porting/PortTagCommand.cs
index ea1b3ddf..966ad930 100644
--- a/TagTool/Commands/Porting/PortTagCommand.cs
+++ b/TagTool/Commands/Porting/PortTagCommand.cs
@@ -1256,10 +1256,13 @@ public CachedTag ConvertTagInternal(Stream cacheStream, Stream blamCacheStream,
                             }
                         }
 
-                        _deferredActions.Add(() =>
+                        if (Flags.HasFlag(PortingFlags.UpdateMapFiles))
                         {
-                            new UpdateMapFilesCommand(CacheContext).Execute(new List<string> { });
-                        });
+                            _deferredActions.Add(() =>
+                            {
+                                new UpdateMapFilesCommand(CacheContext).Execute(new List<string> { });
+                            });
+                        }
                     }
                     break;