diff --git a/OpenRA.Mods.Common/Scripting/Global/ReinforcementsGlobal.cs b/OpenRA.Mods.Common/Scripting/Global/ReinforcementsGlobal.cs
index 7c396c18f7..b97ae916e7 100644
--- a/OpenRA.Mods.Common/Scripting/Global/ReinforcementsGlobal.cs
+++ b/OpenRA.Mods.Common/Scripting/Global/ReinforcementsGlobal.cs
@@ -55,7 +55,12 @@ namespace OpenRA.Mods.Common.Scripting
 				initDict.Add(new FacingInit(facing));
 			}
 
-			return Context.World.CreateActor(addToWorld, actorType, initDict);
+			// The actor must be added to the world at the end of the tick.
+			var a = Context.World.CreateActor(false, actorType, initDict);
+			if (addToWorld)
+				Context.World.AddFrameEndTask(w => w.Add(a));
+
+			return a;
 		}
 
 		void Move(Actor actor, CPos dest)