diff --git a/common/preferences.c b/common/preferences.c
index f27d804..f8aab70 100644
--- a/common/preferences.c
+++ b/common/preferences.c
@@ -1566,7 +1566,11 @@ multiload_preferences_fill_dialog (GtkWidget *dialog, MultiloadPlugin *ma)
 	multiload_preferences_update_dynamic_widgets(ma);
 
 	// other stuff
+#ifdef MULTILOAD_DEVELOPER_MODE
 	multiload_developer_buttons(ma);
+#else
+        multiload_developer_buttons();
+#endif
 
 	#if GTK_API == 3 && GTK_CHECK_VERSION(3,16,0)
 	if (gtk_check_version(3,16,0) == NULL)
diff --git a/common/util.h b/common/util.h
index 23ef306..aa3855e 100644
--- a/common/util.h
+++ b/common/util.h
@@ -49,7 +49,7 @@ show_modal_info_dialog(GtkWindow *parent, GtkMessageType type, const gchar *mess
 G_GNUC_INTERNAL gchar*
 get_system_monitor_executable();
 G_GNUC_INTERNAL void
-xdg_open_url();
+xdg_open_url(const gchar* url);
 
 G_GNUC_INTERNAL GdkPixbuf*
 cairo_surface_to_gdk_pixbuf(cairo_surface_t *surface, guint width, guint height);