diff --git a/baobab/src/callbacks.c b/baobab/src/callbacks.c
index 64c1cd6..523f8cf 100644
--- a/baobab/src/callbacks.c
+++ b/baobab/src/callbacks.c
@@ -97,7 +97,7 @@ on_about_activate (GtkMenuItem *menuitem, gpointer user_data)
 
 	static const gchar copyright[] = "Fabio Marzocca <thesaltydog@gmail.com> \xc2\xa9 2005-2010";
 
-	gtk_show_about_dialog (NULL,
+	gtk_show_about_dialog (GTK_WINDOW (baobab.window),
 			       "name", _("Baobab"),
 			       "comments", _("A graphical tool to analyze "
 					     "disk usage."),
