diff --git a/python/server.py b/python/server.py
index ef46790..89fd61c 100755
--- a/python/server.py
+++ b/python/server.py
@@ -41,7 +41,7 @@ def serial_func():
     while True:
       with globals()['lock']:
         if globals()['data'] != '':
-          serial.write(bytes(globals()['data'], 'ascii'))
+          ser.write(bytes(globals()['data'], 'ascii'))
           globals()['data'] = ''
       time.sleep(0.1)