diff --git a/Mage.Sets/src/mage/sets/championsofkamigawa/MasakoTheHumorless.java b/Mage.Sets/src/mage/sets/championsofkamigawa/MasakoTheHumorless.java
index f40d242140f..ce450653de3 100644
--- a/Mage.Sets/src/mage/sets/championsofkamigawa/MasakoTheHumorless.java
+++ b/Mage.Sets/src/mage/sets/championsofkamigawa/MasakoTheHumorless.java
@@ -100,7 +100,7 @@ class BlockTappedEffect extends AsThoughEffectImpl {
 
     @Override
     public boolean applies(UUID sourceId, Ability source, UUID affectedControllerId, Game game) {
-        Permanent permanent = game.getPermanent(source.getSourceId());
+        Permanent permanent = game.getPermanent(sourceId);
         if (permanent != null && permanent.getControllerId().equals(source.getControllerId())) {
             return true;
         }