diff --git a/cicaprojekt/Field.java b/cicaprojekt/Field.java
index 18a1100..a6f6747 100644
--- a/cicaprojekt/Field.java
+++ b/cicaprojekt/Field.java
@@ -25,6 +25,7 @@ public class Field extends cicaprojekt.Tile {
 
     @Override
     public boolean canHazZPM() {
-        return true;
+        if(boxStack.size() > 0) return false;
+        else return true;
     }
 }