diff --git a/src/piechart/qpiemodelmapper.h b/src/piechart/qpiemodelmapper.h
index 0891ac5..76fccc5 100644
--- a/src/piechart/qpiemodelmapper.h
+++ b/src/piechart/qpiemodelmapper.h
@@ -48,7 +48,7 @@ public:
     void reset();
 
 private:
-    QScopedPointer<QPieModelMapperPrivate> d_ptr;
+    QPieModelMapperPrivate * const d_ptr;
     Q_DECLARE_PRIVATE(QPieModelMapper)
 };