diff --git a/pluginloader.cpp b/pluginloader.cpp
index 0adf64f65..745d19035 100644
--- a/pluginloader.cpp
+++ b/pluginloader.cpp
@@ -355,7 +355,7 @@ KPluginInfo::List PluginLoader::internalServiceInfo() const
     return KPluginInfo::List();
 }
 
-KPluginInfo::List standardInternalInfo(const QString &type, const QString &category = 0)
+KPluginInfo::List standardInternalInfo(const QString &type, const QString &category = QString())
 {
     QStringList files = KGlobal::dirs()->findAllResources("appdata",
                                                           "plasma/internal/" + type + "/*.desktop",