diff --git a/birdie.py b/birdie.py
index b21d276..bd8bf29 100644
--- a/birdie.py
+++ b/birdie.py
@@ -8,6 +8,9 @@ def on_mouse_down():
     print('Stop!')
     titi.speed = 0
 
+def on_mouse_up():
+    titi.speed = 1
+
 def update():
     titi.x += titi.speed