diff --git a/lib/upnp/igd_service.go b/lib/upnp/igd_service.go
index 4008f5ea..faa31f8d 100644
--- a/lib/upnp/igd_service.go
+++ b/lib/upnp/igd_service.go
@@ -70,7 +70,7 @@ func (s *IGDService) AddPortMapping(localIPAddress net.IP, protocol nat.Protocol
 			return unmarshalErr
 		}
 		if envelope.ErrorCode == 725 {
-			return s.AddPortMapping(localIPAddress, protocol, externalPort, internalPort, description, 0)
+			return s.AddPortMapping(localIPAddress, protocol, internalPort, externalPort, description, 0)
 		}
 	}