diff --git a/OpenRA.Mods.AS/Traits/Conditions/GrantTimedConditionOnTeleport.cs b/OpenRA.Mods.AS/Traits/Conditions/GrantTimedConditionOnTeleport.cs
index 926dc4fc5b37..2c0c4e6a0333 100644
--- a/OpenRA.Mods.AS/Traits/Conditions/GrantTimedConditionOnTeleport.cs
+++ b/OpenRA.Mods.AS/Traits/Conditions/GrantTimedConditionOnTeleport.cs
@@ -96,7 +96,7 @@ void ITick.Tick(Actor self)
 
 		void IOnSuccessfulTeleportRA2.OnSuccessfulTeleport(string type, WPos oldPos, WPos newPos)
 		{
-			if (Info.TeleportTypes.Contains(type))
+			if (Info.TeleportTypes.Count != 0 && Info.TeleportTypes.Contains(type))
 				GrantCondition(self, info.Condition);
 		}