+### X11Keymap has no attribute 'get_scroll_lock_state'
+
+If running the script gives the error message
+
+ AttributeError: 'gtk.gdk.X11Keymap' object has no attribute 'get_scroll_lock_state'
+
+then your installed GTK+ version is probably older than 3.18, which
+does not support `get_scroll_lock_state`. Either hide all Scroll Lock
+functionality (See [Examples](#examples)), or upgrade your system.
+