diff --git a/src/corelib/tools/qcommandlineoption.h b/src/corelib/tools/qcommandlineoption.h
index 7775aae5b6..49223cda37 100644
--- a/src/corelib/tools/qcommandlineoption.h
+++ b/src/corelib/tools/qcommandlineoption.h
@@ -87,6 +87,8 @@ private:
     QSharedDataPointer<QCommandLineOptionPrivate> d;
 };
 
+Q_DECLARE_SHARED(QCommandLineOption)
+
 QT_END_NAMESPACE
 
 #endif // QCOMMANDLINEOPTION_H