diff --git a/src/qml/qmlcontrolproxy.h b/src/qml/qmlcontrolproxy.h
index 3bbf3435cb6..de61c18b204 100644
--- a/src/qml/qmlcontrolproxy.h
+++ b/src/qml/qmlcontrolproxy.h
@@ -19,7 +19,7 @@ class QmlControlProxy : public QObject, public QQmlParserStatus {
     Q_PROPERTY(QString group READ getGroup WRITE setGroup NOTIFY groupChanged)
     Q_PROPERTY(QString key READ getKey WRITE setKey NOTIFY keyChanged)
     Q_PROPERTY(QString keyValid READ isKeyValid NOTIFY keyValidChanged)
-    Q_PROPERTY(QString initialized READ isInitialized NOTIFY initializedChanged)
+    Q_PROPERTY(bool initialized READ isInitialized NOTIFY initializedChanged)
     Q_PROPERTY(double value READ getValue WRITE setValue NOTIFY valueChanged)
     Q_PROPERTY(double parameter READ getParameter WRITE setParameter NOTIFY parameterChanged)