diff --git a/src/Client.php b/src/Client.php
index a33fe659..b9d8914c 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -187,7 +187,7 @@ function_exists('curl_init') && (($info = curl_version()) &&
         }*/
 
         // initialize user_agent string
-        $this->user_agent = PhpXmlRpc::$xmlrpcName . ' ' . PhpXmlRpc::$xmlrpcVersion;
+        $this->user_agent = PhpXmlRpc::$xmlrpcName . '/' . PhpXmlRpc::$xmlrpcVersion;
     }
 
     /**