diff --git a/Mage.Sets/src/mage/sets/scarsofmirrodin/Riddlesmith.java b/Mage.Sets/src/mage/sets/scarsofmirrodin/Riddlesmith.java
index 9dcb5ef1f1e..84343d24402 100644
--- a/Mage.Sets/src/mage/sets/scarsofmirrodin/Riddlesmith.java
+++ b/Mage.Sets/src/mage/sets/scarsofmirrodin/Riddlesmith.java
@@ -86,7 +86,7 @@ class RiddlesmithTriggeredAbility extends TriggeredAbilityImpl<RiddlesmithTrigge
 
     @Override
     public boolean checkTrigger(GameEvent event, Game game) {
-        if (event.getType() == GameEvent.EventType.SPELL_CAST) {
+        if (event.getType() == GameEvent.EventType.SPELL_CAST && event.getPlayerId().equals(this.getControllerId())) {
 			Spell spell = game.getStack().getSpell(event.getTargetId());
 			if (spell != null && spell.getCardType().contains(CardType.ARTIFACT)) {
 				return true;