diff --git a/src/dbus/qdbusmetaobject.cpp b/src/dbus/qdbusmetaobject.cpp
index 543b185df9e..f1b586f58d7 100644
--- a/src/dbus/qdbusmetaobject.cpp
+++ b/src/dbus/qdbusmetaobject.cpp
@@ -116,8 +116,11 @@ static int registerComplexDBusType(const QByteArray &typeName)
     {
         ~Hash()
         {
-            for (QMetaType entry : *this)
+            for (QMetaType entry : std::as_const(*this)) {
+                auto iface = static_cast<const QDBusRawTypeHandler *>(entry.iface());
                 QMetaType::unregisterMetaType(std::move(entry));
+                delete iface;
+            }
         }
     } hash;
     QMutexLocker lock(&mutex);