diff --git a/forge-game/src/main/java/forge/game/trigger/TriggerChangesZone.java b/forge-game/src/main/java/forge/game/trigger/TriggerChangesZone.java
index c61db5f2b6b..7cad2a61bff 100644
--- a/forge-game/src/main/java/forge/game/trigger/TriggerChangesZone.java
+++ b/forge-game/src/main/java/forge/game/trigger/TriggerChangesZone.java
@@ -138,7 +138,7 @@ public class TriggerChangesZone extends Trigger {
             // card, rather than keeping track of the host card itself - but it's good enough for now - since there are
             // no cards with multiple different OncePerEffect triggers.
             SpellAbilityStackInstance si = (SpellAbilityStackInstance) runParams2.get("SpellAbilityStackInstance");
-            return si.attemptOncePerEffectTrigger(this.getHostCard());
+            return si != null && si.attemptOncePerEffectTrigger(this.getHostCard());
         }
 
         return true;