--- a/src/corelib/animation/qpropertyanimation.cpp	
+++ a/src/corelib/animation/qpropertyanimation.cpp	
@@ -134,9 +134,10 @@ void QPropertyAnimationPrivate::updateProperty(const QVariant &newValue)
     }
 
     if (newValue.userType() == propertyType) {
-        //no conversion is needed, we directly call the QMetaObject::metacall
-        void *data = const_cast<void*>(newValue.constData());
-        QMetaObject::metacall(targetValue, QMetaObject::WriteProperty, propertyIndex, &data);
+        int status = -1;
+        int flags = 0;
+        void *argv[] = { const_cast<void*>(newValue.data()), 0, &status, &flags };
+        QMetaObject::metacall(targetValue, QMetaObject::WriteProperty, propertyIndex, argv);
     } else {
         targetValue->setProperty(propertyName.constData(), newValue);
     }