1 files changed, 2 insertions, 4 deletions
diff --git a/toolbox.py b/toolbox.py
index 0646892..acd770b 100644
--- a/toolbox.py
+++ b/toolbox.py
@@ -816,10 +816,8 @@ class ImageToolbar(Gtk.Toolbar):
     def invert_colors(self, widget):
         window = self.get_window()
         old_cursor = window.get_cursor()
-        source_id = GObject.idle_add(self.set_watch_cursor, window)
-        self._activity.area.invert_colors(widget, old_cursor,
-            source_id, window)
+        GObject.idle_add(self.set_watch_cursor, window)
+        self._activity.area.invert_colors(widget, old_cursor, window)
 
     def set_watch_cursor(self, window):
         window.set_cursor(Gdk.Cursor.new(Gdk.CursorType.WATCH))
-        return True