diff --git a/OpenRA.Mods.Common/UpdateRules/Rules/20210321/UnhardcodeBaseBuilderBotModule.cs b/OpenRA.Mods.Common/UpdateRules/Rules/20210321/UnhardcodeBaseBuilderBotModule.cs
new file mode 100644
index 0000000000..90decf27e7
--- /dev/null
+++ b/OpenRA.Mods.Common/UpdateRules/Rules/20210321/UnhardcodeBaseBuilderBotModule.cs
@@ -0,0 +1,39 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2022 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Mods.Common.Traits;
+
+namespace OpenRA.Mods.Common.UpdateRules.Rules
+{
+	public class UnhardcodeBaseBuilderBotModule : UpdateRule
+	{
+		public override string Name => "BaseBuilderBotModule got new fields to configure buildings that are defenses.";
+
+		public override string Description => "DefenseTypes were added.";
+
+		public override IEnumerable<string> UpdateActorNode(ModData modData, MiniYamlNode actorNode)
+		{
+			var addNodes = new List<MiniYamlNode>();
+
+			var defense = modData.DefaultRules.Actors.Values.Where(a => a.HasTraitInfo<BuildingInfo>() && a.HasTraitInfo<AttackBaseInfo>()).Select(a => a.Name);
+			var defensetypes = new MiniYamlNode("DefenseTypes", FieldSaver.FormatValue(defense.ToList()));
+			addNodes.Add(defensetypes);
+
+			foreach (var baseBuilderManager in actorNode.ChildrenMatching("BaseBuilderBotModule"))
+				foreach (var addNode in addNodes)
+					baseBuilderManager.AddNode(addNode);
+
+			yield break;
+		}
+	}
+}
diff --git a/OpenRA.Mods.Common/UpdateRules/UpdatePath.cs b/OpenRA.Mods.Common/UpdateRules/UpdatePath.cs
index 28d2237ad7..3ad601ddb1 100644
--- a/OpenRA.Mods.Common/UpdateRules/UpdatePath.cs
+++ b/OpenRA.Mods.Common/UpdateRules/UpdatePath.cs
@@ -94,6 +94,7 @@ namespace OpenRA.Mods.Common.UpdateRules
 				new RenameCloakTypes(),
 				new SplitNukePowerMissileImage(),
 				new ReplaceSequenceEmbeddedPalette(),
+				new UnhardcodeBaseBuilderBotModule(),
 			})
 		};