diff --git a/dstat_interface/main.py b/dstat_interface/main.py
index 5a4655a6022f254c2fc17f4b267f8a590fca07c5..d2ffdd6925ecd9f442fa1b570847c131023e1579 100755
--- a/dstat_interface/main.py
+++ b/dstat_interface/main.py
@@ -210,7 +210,7 @@ class Main(object):
 
     def on_gtk_about_activate(self, menuitem, data=None):
         """Display the about window."""
-        self.response = self.aboutdialog.run()  # waits for user to click close
+        self.aboutdialog.run()  # waits for user to click close
         self.aboutdialog.hide()
 
     def on_menu_analysis_options_activate(self, menuitem, data=None):