diff --git a/unix/x0vncserver/PollingManager.h b/unix/x0vncserver/PollingManager.h
index 015b3ca..97a158f 100644
--- a/unix/x0vncserver/PollingManager.h
+++ b/unix/x0vncserver/PollingManager.h
@@ -64,7 +64,7 @@
   Display *m_dpy;
   VNCServer *m_server;
 
-  Image *m_image;
+  const Image *m_image;
   const int m_bytesPerPixel;
 
   const int m_offsetLeft;
@@ -74,16 +74,6 @@
 
 private:
 
-  inline void getScreen() {
-    m_image->get(DefaultRootWindow(m_dpy), m_offsetLeft, m_offsetTop);
-  }
-
-  inline void getScreenRect(const Rect& r) {
-    m_image->get(DefaultRootWindow(m_dpy),
-                 m_offsetLeft + r.tl.x, m_offsetTop + r.tl.y,
-                 r.width(), r.height(), r.tl.x, r.tl.y);
-  }
-
   inline void getRow(int x, int y, int w) {
     if (w == m_width) {
       // Getting full row may be more efficient.