diff --git a/clients/riscos/Manager.cpp b/clients/riscos/Manager.cpp
index 0099d676d4..a18a24c3e1 100644
--- a/clients/riscos/Manager.cpp
+++ b/clients/riscos/Manager.cpp
@@ -20,10 +20,14 @@
   Boston, MA 02111-1307, USA.
 */
 
+#include <unistd.h> // for usleep
+
 #include <qpainter.h>
 #include <qimage.h>
 #include <qlayout.h>
 
+#include <netwm.h>
+
 #include "../../options.h"
 #include "../../workspace.h"
 
@@ -319,6 +323,48 @@ Manager::slotHelp()
   contextHelp();
 }
 
+  void
+Manager::animateIconifyOrDeiconify(bool iconify)
+{
+  NETRect r = netWinInfo()->iconGeometry();
+
+  QRect icongeom(r.pos.x, r.pos.y, r.size.width, r.size.height);
+
+  if (!icongeom.isValid())
+    return;
+
+  QRect wingeom(x(), y(), width(), height());
+
+  XGrabServer(qt_xdisplay());
+
+  QPainter p(workspace()->desktopWidget());
+
+  p.setRasterOp(Qt::NotROP);
+
+  if (iconify)
+    p.setClipRegion(QRegion(workspace()->desktopWidget()->rect()) - wingeom);
+
+  p.drawLine(wingeom.bottomRight(), icongeom.bottomRight());
+  p.drawLine(wingeom.bottomLeft(), icongeom.bottomLeft());
+  p.drawLine(wingeom.topLeft(), icongeom.topLeft());
+  p.drawLine(wingeom.topRight(), icongeom.topRight());
+
+  p.flush();
+
+  XSync( qt_xdisplay(), FALSE );
+
+  usleep(30000);
+
+  p.drawLine(wingeom.bottomRight(), icongeom.bottomRight());
+  p.drawLine(wingeom.bottomLeft(), icongeom.bottomLeft());
+  p.drawLine(wingeom.topLeft(), icongeom.topLeft());
+  p.drawLine(wingeom.topRight(), icongeom.topRight());
+
+  p.end();
+
+  XUngrabServer( qt_xdisplay() );
+}
+
 
 } // End namespace
 
diff --git a/clients/riscos/Manager.h b/clients/riscos/Manager.h
index 7fbca2e1b2..dc4112a1ac 100644
--- a/clients/riscos/Manager.h
+++ b/clients/riscos/Manager.h
@@ -73,6 +73,7 @@ class Manager : public Client
     void paintEvent(QPaintEvent *);
     void resizeEvent(QResizeEvent *);
     void mouseDoubleClickEvent(QMouseEvent *);
+    void animateIconifyOrDeiconify(bool);
 
   protected slots: