diff --git a/Mage.Sets/src/mage/cards/t/TwoHeadedGiant.java b/Mage.Sets/src/mage/cards/t/TwoHeadedGiant.java
index f78aecccc9..1e9bdd16e2 100644
--- a/Mage.Sets/src/mage/cards/t/TwoHeadedGiant.java
+++ b/Mage.Sets/src/mage/cards/t/TwoHeadedGiant.java
@@ -39,6 +39,7 @@ import mage.constants.SubType;
 import mage.cards.CardImpl;
 import mage.cards.CardSetInfo;
 import mage.constants.CardType;
+import mage.constants.Duration;
 import mage.constants.Outcome;
 import mage.game.Game;
 import mage.players.Player;
@@ -98,9 +99,9 @@ class TwoHeadedGiantEffect extends OneShotEffect {
         boolean head2 = player.flipCoin(game);
         if (head1 == head2) {
             if (head1) {
-                new GainAbilitySourceEffect(DoubleStrikeAbility.getInstance()).apply(game, source);
+                game.addEffect(new GainAbilitySourceEffect(DoubleStrikeAbility.getInstance(), Duration.EndOfTurn), source);
             } else {
-                new GainAbilitySourceEffect(new MenaceAbility()).apply(game, source);
+                game.addEffect(new GainAbilitySourceEffect(new MenaceAbility(), Duration.EndOfTurn), source);
             }
         }
         return true;