diff --git a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/util/PistonCalculator.java b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/util/PistonCalculator.java
index ddc98cd5..4479ff63 100644
--- a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/util/PistonCalculator.java
+++ b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/util/PistonCalculator.java
@@ -55,7 +55,8 @@ public class PistonCalculator implements Listener {
     public void onPlayerInteract(PlayerInteractEvent event) {
         if (!Permission.BUILD.hasPermission(event.getPlayer())) return;
         if (event.getAction() != Action.RIGHT_CLICK_BLOCK) return;
-        if (event.hasItem() && event.getItem().getType() != Material.SLIME_BALL) return;
+        if (event.hasItem() && event.getItem().getType() == Material.SLIME_BALL) {
+        } else if (event.hasItem()) return;
         if (event.getClickedBlock() == null) return;
         Block clickedBlock = event.getClickedBlock();
         Material blockType = clickedBlock.getType();