diff --git a/autostart.sh b/autostart.sh
index 54d7b4c..0c4641a 100755
--- a/autostart.sh
+++ b/autostart.sh
@@ -7,3 +7,4 @@ mmsdtng &
 nm-applet &
 pasystray &
 xfce4-power-manager &
+/usr/lib/polkit-gnome/polkit-gnome-authentication-agent-1 &
diff --git a/rc.lua b/rc.lua
index 4386b7e..f66b2d7 100644
--- a/rc.lua
+++ b/rc.lua
@@ -22,6 +22,9 @@ vkbd.init("ansi")
 function powermenu.suspend()
  awful.spawn("dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager.Suspend boolean:true")
 end
+function powermenu.poweroff()
+ awful.spawn("dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager.PowerOff boolean:true")
+end
 
 -- {{{ Error handling
 -- Check if awesome encountered an error during startup and fell back to