diff --git a/examples/tutorials/pong/steps/step5/pong.kv b/examples/tutorials/pong/steps/step5/pong.kv
index 6cca4a38a..591bf14b1 100644
--- a/examples/tutorials/pong/steps/step5/pong.kv
+++ b/examples/tutorials/pong/steps/step5/pong.kv
@@ -11,8 +11,8 @@
     size: 25, 200
     canvas:
         Rectangle:
-            pos:self.pos
-            size:self.size
+            pos: self.pos
+            size: self.size
 
 <PongGame>:
     ball: pong_ball