diff --git a/modem/config.py b/modem/config.py
index f3070d12..cd6dcb18 100644
--- a/modem/config.py
+++ b/modem/config.py
@@ -31,7 +31,6 @@ class CONFIG:
             'control': str,
             'serial_port': str,
             'model_id': int,
-            'serial_port': str,
             'serial_speed': int,
             'data_bits': int,
             'stop_bits': int,