--- /dev/null
+--- src/gui_user.c.old 2016-02-04 21:21:15.141455597 +0100
++++ src/gui_user.c 2016-02-04 21:21:31.016156493 +0100
+@@ -820,7 +820,7 @@
+
+ dialog = gtk_message_dialog_new(GTK_WINDOW(user->gui_user.g_window),
+ GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_INFO,
+- GTK_BUTTONS_CLOSE, msg);
++ GTK_BUTTONS_CLOSE, "%s", msg);
+
+ gtk_window_set_transient_for(GTK_WINDOW(user->gui_user.g_window),
+ GTK_WINDOW(dialog));