diff --git a/Mage.Sets/src/mage/cards/c/CecilDarkKnight.java b/Mage.Sets/src/mage/cards/c/CecilDarkKnight.java
index 1ea6a992f61..f04cf84aa28 100644
--- a/Mage.Sets/src/mage/cards/c/CecilDarkKnight.java
+++ b/Mage.Sets/src/mage/cards/c/CecilDarkKnight.java
@@ -6,7 +6,6 @@ import mage.abilities.common.DealsDamageSourceTriggeredAbility;
 import mage.abilities.condition.Condition;
 import mage.abilities.decorator.ConditionalOneShotEffect;
 import mage.abilities.dynamicvalue.common.SavedDamageValue;
-import mage.abilities.effects.OneShotEffect;
 import mage.abilities.effects.common.LoseLifeSourceControllerEffect;
 import mage.abilities.effects.common.TransformSourceEffect;
 import mage.abilities.effects.common.UntapSourceEffect;
@@ -50,7 +49,7 @@ public final class CecilDarkKnight extends CardImpl {
                 new UntapSourceEffect(),
                 CecilDarkKnightCondition.instance
         ).addEffect(
-                (OneShotEffect) new TransformSourceEffect(true).concatBy("and")
+                new TransformSourceEffect(true).concatBy("and")
         ).concatBy("Then"));
         this.addAbility(ability);
     }
diff --git a/Mage/src/main/java/mage/abilities/effects/OneShotEffect.java b/Mage/src/main/java/mage/abilities/effects/OneShotEffect.java
index 37725006a31..3463066e012 100644
--- a/Mage/src/main/java/mage/abilities/effects/OneShotEffect.java
+++ b/Mage/src/main/java/mage/abilities/effects/OneShotEffect.java
@@ -31,7 +31,13 @@ public abstract class OneShotEffect extends EffectImpl {
     }
 
     @Override
-    public Effect setTargetPointer(TargetPointer targetPointer) {
+    public OneShotEffect concatBy(String concatPrefix) {
+        super.concatBy(concatPrefix);
+        return this;
+    }
+
+    @Override
+    public OneShotEffect setTargetPointer(TargetPointer targetPointer) {
         super.setTargetPointer(targetPointer);
         return this;
     }