diff --git a/src/corelib/tools/qcollator.h b/src/corelib/tools/qcollator.h
index 1007aa7623..941637e200 100644
--- a/src/corelib/tools/qcollator.h
+++ b/src/corelib/tools/qcollator.h
@@ -122,6 +122,9 @@ private:
     void detach();
 };
 
+Q_DECLARE_SHARED(QCollatorSortKey)
+Q_DECLARE_SHARED(QCollator)
+
 QT_END_NAMESPACE
 
 #endif // QCOLLATOR_P_H