diff --git a/Mage/src/main/java/mage/abilities/effects/ContinuousEffects.java b/Mage/src/main/java/mage/abilities/effects/ContinuousEffects.java
index 883807e98eb..2aa92e4872f 100644
--- a/Mage/src/main/java/mage/abilities/effects/ContinuousEffects.java
+++ b/Mage/src/main/java/mage/abilities/effects/ContinuousEffects.java
@@ -1333,7 +1333,7 @@ public class ContinuousEffects implements Serializable {
         }
     }
 
-    public void setController(UUID cardId, UUID controllerId) {
+    public synchronized void setController(UUID cardId, UUID controllerId) {
         for (ContinuousEffectsList effectsList : allEffectsLists) {
             setControllerForEffect(effectsList, cardId, controllerId);
         }