diff --git a/src/bin/e_config.h b/src/bin/e_config.h
index 9dcebdc7b..e97a1a42b 100644
--- a/src/bin/e_config.h
+++ b/src/bin/e_config.h
@@ -400,7 +400,7 @@ struct _E_Config
       const char *desklock_layout;
    } xkb;
    
-   unsigned char exe_always_single_instance;
+   unsigned char exe_always_single_instance; // GUI
    int           use_desktop_window_profile; // GUI
 };