diff --git a/screen_ui.h b/screen_ui.h
index fc35d95..5c4366d 100644
--- a/screen_ui.h
+++ b/screen_ui.h
@@ -39,6 +39,8 @@
     void ShowProgress(float portion, float seconds);
     void SetProgress(float fraction);
 
+    void SetStage(int current, int max);
+
     // text log
     void ShowText(bool visible);
     bool IsTextVisible();
@@ -58,9 +60,6 @@
     enum UIElement { HEADER, MENU, MENU_SEL_BG, MENU_SEL_FG, LOG, TEXT_FILL };
     virtual void SetColor(UIElement e);
 
-  protected:
-    int install_overlay_offset_x, install_overlay_offset_y;
-
   private:
     Icon currentIcon;
     int installingFrame;
@@ -73,6 +72,8 @@
     gr_surface *progressBarIndeterminate;
     gr_surface progressBarEmpty;
     gr_surface progressBarFill;
+    gr_surface stageMarkerEmpty;
+    gr_surface stageMarkerFill;
 
     ProgressType progressBarType;
 
@@ -102,8 +103,13 @@
     int animation_fps;
     int indeterminate_frames;
     int installing_frames;
+  protected:
+    int install_overlay_offset_x, install_overlay_offset_y;
+  private:
     int overlay_offset_x, overlay_offset_y;
 
+    int stage, max_stage;
+
     void draw_install_overlay_locked(int frame);
     void draw_background_locked(Icon icon);
     void draw_progress_locked();