diff --git a/src/dbus/qdbusargument.cpp b/src/dbus/qdbusargument.cpp
index 7023958f56..18d849ba4b 100644
--- a/src/dbus/qdbusargument.cpp
+++ b/src/dbus/qdbusargument.cpp
@@ -58,6 +58,8 @@
 
 QT_BEGIN_NAMESPACE
 
+QT_IMPL_METATYPE_EXTERN(QDBusArgument)
+
 QDBusArgumentPrivate::~QDBusArgumentPrivate()
 {
     if (message)
diff --git a/src/dbus/qdbusargument.h b/src/dbus/qdbusargument.h
index bf4a6e40e6..9df2e2eddb 100644
--- a/src/dbus/qdbusargument.h
+++ b/src/dbus/qdbusargument.h
@@ -157,7 +157,7 @@ protected:
 Q_DECLARE_SHARED(QDBusArgument)
 
 QT_END_NAMESPACE
-Q_DECLARE_METATYPE(QDBusArgument)
+QT_DECL_METATYPE_EXTERN(QDBusArgument, Q_DBUS_EXPORT)
 QT_BEGIN_NAMESPACE
 
 template<typename T> inline T qdbus_cast(const QDBusArgument &arg)
diff --git a/src/dbus/qdbusintegrator.cpp b/src/dbus/qdbusintegrator.cpp
index 9ddaf8d4c1..5c30bc04c0 100644
--- a/src/dbus/qdbusintegrator.cpp
+++ b/src/dbus/qdbusintegrator.cpp
@@ -79,6 +79,8 @@
 
 QT_BEGIN_NAMESPACE
 
+QT_IMPL_METATYPE_EXTERN(QDBusSlotCache)
+
 // used with dbus_server_allocate_data_slot
 static dbus_int32_t server_slot = -1;
 
diff --git a/src/dbus/qdbusintegrator_p.h b/src/dbus/qdbusintegrator_p.h
index 3a459251f7..b850c1cad4 100644
--- a/src/dbus/qdbusintegrator_p.h
+++ b/src/dbus/qdbusintegrator_p.h
@@ -169,7 +169,7 @@ public:
 
 QT_END_NAMESPACE
 
-Q_DECLARE_METATYPE(QDBusSlotCache)
+QT_DECL_METATYPE_EXTERN(QDBusSlotCache, Q_DBUS_EXPORT)
 
 #endif // QT_NO_DBUS
 #endif