diff --git a/src/qml/jsruntime/qv4qobjectwrapper.cpp b/src/qml/jsruntime/qv4qobjectwrapper.cpp
index 346ca62a6f6..26e72018c5b 100644
--- a/src/qml/jsruntime/qv4qobjectwrapper.cpp
+++ b/src/qml/jsruntime/qv4qobjectwrapper.cpp
@@ -989,6 +989,10 @@ void QObjectWrapper::destroyObject(bool lastCall)
                 // If the object is C++-owned, we still have to release the weak reference we have
                 // to it.
                 ddata->jsWrapper.clear();
+                if (lastCall && ddata->propertyCache) {
+                    ddata->propertyCache->release();
+                    ddata->propertyCache = nullptr;
+                }
             }
         }
     }
diff --git a/tests/auto/qml/qjsengine/tst_qjsengine.cpp b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
index 82bc3d0c59f..2642d10545a 100644
--- a/tests/auto/qml/qjsengine/tst_qjsengine.cpp
+++ b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
@@ -29,6 +29,7 @@
 
 #include <QtTest/QtTest>
 
+#include <private/qqmldata_p.h>
 #include <qjsengine.h>
 #include <qjsvalueiterator.h>
 #include <qgraphicsitem.h>
@@ -73,6 +74,7 @@ private slots:
     void newQObject();
     void newQObject_ownership();
     void newQObject_deletedEngine();
+    void newQObjectPropertyCache();
     void newQMetaObject();
     void exceptionInSlot();
     void globalObjectProperties();
@@ -757,6 +759,19 @@ class TestQMetaObject : public QObject {
     int m_called;
 };
 
+void tst_QJSEngine::newQObjectPropertyCache()
+{
+    QScopedPointer<QObject> obj(new QObject);
+    QQmlEngine::setObjectOwnership(obj.data(), QQmlEngine::CppOwnership);
+
+    {
+        QJSEngine engine;
+        engine.newQObject(obj.data());
+        QVERIFY(QQmlData::get(obj.data())->propertyCache);
+    }
+    QVERIFY(!QQmlData::get(obj.data())->propertyCache);
+}
+
 void tst_QJSEngine::newQMetaObject() {
     {
         QJSEngine engine;