diff --git a/TestON/drivers/common/api/controller/trexclientdriver.py b/TestON/drivers/common/api/controller/trexclientdriver.py
index 030e42b..a3923c9 100644
--- a/TestON/drivers/common/api/controller/trexclientdriver.py
+++ b/TestON/drivers/common/api/controller/trexclientdriver.py
@@ -149,7 +149,7 @@
                                               trex_args=trex_args)
         success = self.__set_up_trex_server(
             self.trex_daemon_client, self.trex_address,
-            pathToTrexConfig + self.trex_config,
+            os.path.join(pathToTrexConfig, self.trex_config),
             self.force_restart
         )
         if not success: