diff --git a/Mage.Sets/src/mage/sets/planarchaos/RathiTrapper.java b/Mage.Sets/src/mage/sets/planarchaos/RathiTrapper.java
index 7a55cb292ea..954a91b4900 100644
--- a/Mage.Sets/src/mage/sets/planarchaos/RathiTrapper.java
+++ b/Mage.Sets/src/mage/sets/planarchaos/RathiTrapper.java
@@ -34,6 +34,7 @@ import mage.constants.Zone;
 import mage.MageInt;
 import mage.abilities.Ability;
 import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.common.TapSourceCost;
 import mage.abilities.costs.mana.ManaCostsImpl;
 import mage.abilities.effects.common.TapTargetEffect;
 import mage.cards.CardImpl;
@@ -58,6 +59,7 @@ public class RathiTrapper extends CardImpl<RathiTrapper> {
 
         // {B}, {tap}: Tap target creature.
         Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new TapTargetEffect(), new ManaCostsImpl("{B}"));
+        ability.addCost(new TapSourceCost());
         ability.addTarget(new TargetCreaturePermanent());
         this.addAbility(ability);
     }