diff --git a/src/advanced_configuration_window.py b/src/advanced_configuration_window.py
index 2a8ae4ad1..ea50c8dc4 100644
--- a/src/advanced_configuration_window.py
+++ b/src/advanced_configuration_window.py
@@ -285,7 +285,7 @@ class AdvancedConfigurationWindow(object):
             else:
                 if str(default) == model[iter_][C_VALUE]:
                     return
-                self.on_config_edited(None, path, str(default))
+                self.on_config_edited(None, path.to_string(), str(default))
 
     def on_advanced_close_button_clicked(self, widget):
         self.window.destroy()
diff --git a/src/gajim.py b/src/gajim.py
index d6ffabff4..2ae96ded0 100644
--- a/src/gajim.py
+++ b/src/gajim.py
@@ -394,7 +394,7 @@ if pid_alive():
         print("Gajim is already running, bringing the roster to front...")
         sys.exit(0)
     pix = gtkgui_helpers.get_icon_pixmap('gajim', 48)
-    Gtk.window_set_default_icon(pix) # set the icon to all newly opened wind
+    Gtk.Window.set_default_icon(pix) # set the icon to all newly opened wind
     pritext = _('Gajim is already running')
     sectext = _('Another instance of Gajim seems to be running\nRun anyway?')
     dialog = dialogs.YesNoDialog(pritext, sectext)