diff --git a/Joystick-and-Buzz.md b/Joystick-and-Buzz.md
index 2942534..caa65d4 100644
--- a/Joystick-and-Buzz.md
+++ b/Joystick-and-Buzz.md
@@ -4,6 +4,11 @@ Read both axes of the joystick and simultaneously buzz the speaker. This runs in
 
 **Usage:** [`include inc/joybuzz.plh`](https://github.com/dschmenk/PLASMA/blob/master/src/inc/joybuzz.plh)
 
+**Values:**
+```
+const MAX_JOY = 79 // Maximum axis value
+```
+
 **Function:**
 ```
 joypos(buzz)#4