diff --git a/src/pocketmine/item/StonePickaxe.php b/src/pocketmine/item/StonePickaxe.php
index 60f4ed462..e5a0c419d 100644
--- a/src/pocketmine/item/StonePickaxe.php
+++ b/src/pocketmine/item/StonePickaxe.php
@@ -28,6 +28,6 @@ class StonePickaxe extends Tool{
 	}
 
 	public function isPickaxe(){
-		return Tool::TIER_IRON;
+		return Tool::TIER_STONE;
 	}
 }