diff --git a/polychromatic-controller b/polychromatic-controller
index 2ae31e79..22762eb9 100755
--- a/polychromatic-controller
+++ b/polychromatic-controller
@@ -22,6 +22,7 @@ gi.require_version('Gtk', '3.0')
 gi.require_version('Gdk', '3.0')
 gi.require_version('WebKit2', '4.0')
 from gi.repository import Gtk, Gdk, WebKit2
+from ctypes import cdll, byref, create_string_buffer
 import os
 import sys
 import signal