diff --git a/DemoPrograms/Demo_Buttons_Mac.py b/DemoPrograms/Demo_Buttons_Mac.py
index 90908f6c..035ef8b1 100644
--- a/DemoPrograms/Demo_Buttons_Mac.py
+++ b/DemoPrograms/Demo_Buttons_Mac.py
@@ -25,7 +25,7 @@ def show_win():
                        alpha_channel=0, finalize=True)
 
     for i in range(100):
-        window.eet_alpha(i/100)
+        window.set_alpha(i/100)
         time.sleep(.01)
 
     while True:     # Event Loop