diff --git a/script/RobotTCP.py b/script/RobotTCP.py
index f70e607..2289015 100644
--- a/script/RobotTCP.py
+++ b/script/RobotTCP.py
@@ -59,7 +59,7 @@ class RobotTCP(TcpDevice, Stoppable):
         if ev.strip() == "": return None
         return ev
 
-    def evaluate(self, cmd, timeout =  self.timeout, retries = self.retries):
+    def evaluate(self, cmd, timeout =  timeout, retries = retries):
         ret = self.execute('eval', cmd, timeout, retries)
         if ret.strip() != "": raise Exception(ret)