diff --git a/awesome/rc.lua b/awesome/rc.lua
index adbe692..6a62059 100644
--- a/awesome/rc.lua
+++ b/awesome/rc.lua
@@ -379,9 +379,9 @@ globalkeys = awful.util.table.join(
             awful.util.spawn("xbacklight -dec 5")
         end, {description = "decrease brightness", group="custom"}),
 
-    awful.key({ }, "XF86MonBrightnessUp", function ()
-            awful.util.spawn("xbacklight -inc 5")
-        end, {description = "increase brightness", group="custom"}),
+    awful.key({ }, "XF86PowerOff", function ()
+            awful.util.spawn("gksudo shutdown now")
+        end, {description = "Shutdown", group="custom"}),
 
     awful.key({ }, "Print", function ()
             os.execute('gnome-screenshot -fp "`echo -n ' .. home .. '"/Pictures/Captures/Capture du " && date "+%Y-%m-%d %H:%M:%S"`.png"')