diff --git a/hidinput.py b/hidinput.py
index 06b8160..8b8171c 100644
--- a/hidinput.py
+++ b/hidinput.py
@@ -152,12 +152,12 @@ def handle_my_custom_event(data):
     x = mouseevent['x']
     y = mouseevent['y']
     wheel = mouseevent['wheel']
+    wheel = wheel if wheel >= 0 else 255-abs(wheel)
 
     print("X: {}, Y: {}".format(x, y))
 
     hid_mouse_writeabs(btn, x, y, wheel)
 
-
 @app.route("/hid/keyboard", methods=["POST"])
 def keypress():
     keyevent = json.loads(request.data)