diff --git a/Python/sock.py b/Python/sock.py
index 9b929c7..f0a935f 100644
--- a/Python/sock.py
+++ b/Python/sock.py
@@ -99,6 +99,7 @@ def sendDMX(data):
     #continuously sending the signal; to receive changed values: Threading
 	global DMXRDMFLAG
 	global DMXRDM
+    global DMXSLP
 
 	while True:
 		with serial.Serial('/dev/serial0', baudrate=250000, timeout=DMXSLP, stopbits=serial.STOPBITS_TWO, bytesize=8) as DMXSER:# UART configuration and definition