diff --git a/Notes/04_Classes_objects/01_Class.md b/Notes/04_Classes_objects/01_Class.md
index d8ce5cf..d63d2aa 100644
--- a/Notes/04_Classes_objects/01_Class.md
+++ b/Notes/04_Classes_objects/01_Class.md
@@ -43,8 +43,8 @@ class Player:
         self.health = 100
 
     def move(self, dx, dy):
-        self.dx += dx
-        self.dy += dy
+        self.x += dx
+        self.y += dy
 
     def damage(self, pts):
         self.health -= pts