diff --git a/serial/serial-api.txt b/serial/serial-api.txt
index 75369da24..cbd8e6670 100644
--- a/serial/serial-api.txt
+++ b/serial/serial-api.txt
@@ -49,7 +49,7 @@ Signals		void PortCreated(string path) [experimental]
 
 		void PortRemoved(string path) [experimental]
 
-		void ServiceConnected(string device, string adddress, string pattern)
+		void ServiceConnected(string device)
 
 		void ServiceDisconnected(string device)