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--- a/libupnpp/service.hxx
+++ b/libupnpp/service.hxx
@@ -59,7 +59,7 @@
     std::string m_modelName;
 };
 
-extern Service *service_factory(const string& servicetype,
+extern Service *service_factory(const std::string& servicetype,
                                 const UPnPDeviceDesc& device,
                                 const UPnPServiceDesc& service);