diff --git a/pymodbus/client/tcp.py b/pymodbus/client/tcp.py
index 47686ecfd..b4a8fdc1d 100644
--- a/pymodbus/client/tcp.py
+++ b/pymodbus/client/tcp.py
@@ -209,7 +209,7 @@ def recv(self, size):
         # is received or timeout is expired.
         # If timeout expires returns the read data, also if its length is
         # less than the expected size.
-        self.socket.setblocking(0)
+        self.socket.setblocking(False)
 
         timeout = self.comm_params.timeout_connect