diff --git a/script/RobotTCP.py b/script/RobotTCP.py
index 84bfb90..001a15b 100644
--- a/script/RobotTCP.py
+++ b/script/RobotTCP.py
@@ -39,7 +39,7 @@ class RobotTCP(TcpDevice, Stoppable):
         return rx[4:]
     
     def call(self, msg, timeout =  None):                
-        self.lock.aquire()
+        self.lock.acquire()
         try:
             id = "%03d" % self.msg_id
             self.msg_id = (self.msg_id+1)%1000