diff --git a/Packages/Qt_widget/include/CGAL/IO/Qt_widget.h b/Packages/Qt_widget/include/CGAL/IO/Qt_widget.h
index c25dc1bd7de..83ee3f5fb1d 100644
--- a/Packages/Qt_widget/include/CGAL/IO/Qt_widget.h
+++ b/Packages/Qt_widget/include/CGAL/IO/Qt_widget.h
@@ -87,7 +87,7 @@ public:
   void unlock() { if (Locked>0) --Locked; do_paint(); };
   void do_paint() { if (Locked==0) repaint( FALSE ); };
 
-  virtual QSize sizeHint() const;
+  virtual QSize sizeHint(){return QSize(geometry().width(), geometry().height());} 
   
   // properties
   // ~~~~~~~~~~
diff --git a/Packages/Qt_widget/src/CGALQt/Qt_widget.C b/Packages/Qt_widget/src/CGALQt/Qt_widget.C
index c7451b28d0f..6dfdf472e29 100644
--- a/Packages/Qt_widget/src/CGALQt/Qt_widget.C
+++ b/Packages/Qt_widget/src/CGALQt/Qt_widget.C
@@ -537,10 +537,6 @@ void Qt_widget::clear() {
     qt_layers.erase(std::find(qt_layers.begin(),qt_layers.end(),s));
   }
 
-  QSize Qt_widget::sizeHint(){
-    return QSize(geometry().width(), geometry().height();}
-  } 
-
 } // namespace CGAL
 
 // moc_source_file: ../../include/CGAL/IO/Qt_widget.h