diff --git a/custom_components/midea_ac_lan/config_flow.py b/custom_components/midea_ac_lan/config_flow.py
index afe9f91..c3ae3ee 100644
--- a/custom_components/midea_ac_lan/config_flow.py
+++ b/custom_components/midea_ac_lan/config_flow.py
@@ -844,7 +844,7 @@ async def async_step_manually(
                     ): int,
                     vol.Required(
                         CONF_PROTOCOL,
-                        default=protocol or ProtocolVersion.V3,
+                        default=[protocol] if protocol else ProtocolVersion.V3,
                     ): vol.In(
                         protocol or ProtocolVersion,
                     ),