diff --git a/src/corelib/kernel/qproperty.h b/src/corelib/kernel/qproperty.h
index 7924049698..1faf87aadc 100644
--- a/src/corelib/kernel/qproperty.h
+++ b/src/corelib/kernel/qproperty.h
@@ -566,6 +566,7 @@ Q_CORE_EXPORT void printMetaTypeMismatch(QMetaType actual, QMetaType expected);
 
 class QUntypedBindable
 {
+    friend struct QUntypedBindablePrivate; // allows access to internal data
 protected:
     QUntypedPropertyData *data = nullptr;
     const QtPrivate::QBindableInterface *iface = nullptr;
diff --git a/src/corelib/kernel/qproperty_p.h b/src/corelib/kernel/qproperty_p.h
index 6a074efebb..b2bba3d6f4 100644
--- a/src/corelib/kernel/qproperty_p.h
+++ b/src/corelib/kernel/qproperty_p.h
@@ -629,6 +629,19 @@ Q_CORE_EXPORT BindingEvaluationState *suspendCurrentBindingStatus();
 Q_CORE_EXPORT void restoreBindingStatus(BindingEvaluationState *status);
 }
 
+struct QUntypedBindablePrivate
+{
+    static QtPrivate::QBindableInterface const *getInterface(const QUntypedBindable &bindable)
+    {
+        return bindable.iface;
+    }
+
+    static QUntypedPropertyData *getPropertyData(const QUntypedBindable &bindable)
+    {
+        return bindable.data;
+    }
+};
+
 QT_END_NAMESPACE
 
 #endif // QPROPERTY_P_H