diff --git a/source/component/plant.py b/source/component/plant.py
index 75e3755..a179cfe 100644
--- a/source/component/plant.py
+++ b/source/component/plant.py
@@ -158,7 +158,7 @@ class Plant(pg.sprite.Sprite):
     def digest(self):
         pass
 
-    def attacked():
+    def attacked(self):
         pass
 
     def animation(self):