--- a/usr/lib/linuxmint/mintlocale/mintlocale.py
+++ b/usr/lib/linuxmint/mintlocale/mintlocale.py
@@ -21,6 +21,7 @@ except ImportError as err:
     import ConfigParser as configparser
 
 import gi
+gi.require_version('GdkX11', '3.0')
 gi.require_version('Gtk', '3.0')
 gi.require_version('AccountsService', '1.0')
 from gi.repository import GdkX11