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--- a/libupnpp/control/httpdownload.hxx
+++ b/libupnpp/control/httpdownload.hxx
@@ -20,7 +20,11 @@
 
 #include <string>
 
+namespace UPnPClient {
+
 extern bool downloadUrlWithCurl(const std::string& url,
                                 std::string& out, long timeoutsecs);
 
+}
+
 #endif /* _HTTPDOWNLOAD.H_X_INCLUDED_ */