diff --git a/OpenRA.Mods.RA/AI/HackyAI.cs b/OpenRA.Mods.RA/AI/HackyAI.cs
index 7bb15d84e6..c25260e0ca 100644
--- a/OpenRA.Mods.RA/AI/HackyAI.cs
+++ b/OpenRA.Mods.RA/AI/HackyAI.cs
@@ -500,12 +500,16 @@ namespace OpenRA.Mods.RA.AI
 			return squads.Where(s => s.type == type).FirstOrDefault();
 		}
 
-		Squad RegisterNewSquad(SquadType type, Actor target = null)
+		Squad RegisterNewSquad(SquadType type, Actor target)
 		{
 			var ret = new Squad(this, type, target);
 			squads.Add(ret);
 			return ret;
 		}
+		Squad RegisterNewSquad(SquadType type)
+		{
+			return RegisterNewSquad(type, null);
+		}
 
 		int assignRolesTicks = 0;
 		int rushTicks = 0;