diff --git a/library/HTTP_Adapter.ttcn b/library/HTTP_Adapter.ttcn
index a9d0d83..03de1f3 100644
--- a/library/HTTP_Adapter.ttcn
+++ b/library/HTTP_Adapter.ttcn
@@ -73,10 +73,11 @@
 
 /* run a HTTP request and return the response */
 function f_http_transact(charstring url, charstring method := "GET",
-			 charstring body := "", template HTTPMessage exp := tr_HTTP_Resp2xx)
+			 charstring body := "", template HTTPMessage exp := tr_HTTP_Resp2xx,
+			 float tout := 2.0)
 runs on http_CT return HTTPMessage {
 	var HTTPMessage resp;
-	timer T := 2.0;
+	timer T := tout;
 
 	HTTP.send(ts_HTTP_Connect(g_http_host, g_http_port));
 	//HTTP.receive(Connect_result:?);