diff --git a/src/corelib/tools/qcollator.h b/src/corelib/tools/qcollator.h
index 5ff74fd69a..d81c7c85e3 100644
--- a/src/corelib/tools/qcollator.h
+++ b/src/corelib/tools/qcollator.h
@@ -69,7 +69,7 @@ public:
 protected:
     QCollatorSortKey(QCollatorSortKeyPrivate*);
 
-    QSharedDataPointer<QCollatorSortKeyPrivate> d;
+    QExplicitlySharedDataPointer<QCollatorSortKeyPrivate> d;
 
 private:
     QCollatorSortKey();