diff -urN qt-x11-opensource-src-4.3.5.orig/src/gui/widgets/qabstractslider.h qt-x11-opensource-src-4.3.5/src/gui/widgets/qabstractslider.h
--- qt-x11-opensource-src-4.3.5.orig/src/gui/widgets/qabstractslider.h	2008-09-02 16:12:14.000000000 +0400
+++ qt-x11-opensource-src-4.3.5/src/gui/widgets/qabstractslider.h	2008-09-02 16:50:36.000000000 +0400
@@ -80,7 +80,7 @@
     void setMaximum(int);
     int maximum() const;
 
-    void setRange(int min, int max);
+    virtual void setRange(int min, int max);
 
     void setSingleStep(int);
     int singleStep() const;
@@ -119,7 +119,7 @@
     void triggerAction(SliderAction action);
 
 public Q_SLOTS:
-    void setValue(int);
+    virtual void setValue(int);
     void setOrientation(Qt::Orientation);
 
 Q_SIGNALS: