diff --git a/private/service_p.h b/private/service_p.h
index 1a6004c3e..8afef0b6f 100644
--- a/private/service_p.h
+++ b/private/service_p.h
@@ -97,7 +97,7 @@ public:
     void associatedGraphicsWidgetDestroyed(QObject *obj);
 
     void publish(AnnouncementMethods methods, const QString &name,
-                 PackageMetadata metadata = PackageMetadata());
+                 const PackageMetadata &metadata = PackageMetadata());
 
     void unpublish();
 
diff --git a/service.cpp b/service.cpp
index 2fee81b8b..c0b2e15d9 100644
--- a/service.cpp
+++ b/service.cpp
@@ -95,7 +95,7 @@ void ServicePrivate::associatedGraphicsWidgetDestroyed(QObject *obj)
     associatedGraphicsWidgets.remove(static_cast<QGraphicsWidget*>(obj));
 }
 
-void ServicePrivate::publish(AnnouncementMethods methods, const QString &name, PackageMetadata metadata)
+void ServicePrivate::publish(AnnouncementMethods methods, const QString &name, const PackageMetadata &metadata)
 {
 #ifdef ENABLE_REMOTE_WIDGETS
     if (!serviceProvider) {
@@ -104,7 +104,7 @@ void ServicePrivate::publish(AnnouncementMethods methods, const QString &name, P
         serviceProvider = new ServiceProvider(name, q);
 
         if (methods.testFlag(ZeroconfAnnouncement) &&
-                (DNSSD::ServiceBrowser::isAvailable() == DNSSD::ServiceBrowser::Working)) {
+            (DNSSD::ServiceBrowser::isAvailable() == DNSSD::ServiceBrowser::Working)) {
             //TODO: dynamically pick a free port number.
             publicService = new DNSSD::PublicService(name, "_plasma._tcp", 4000);