diff --git a/ArchiSteamFarm/GlobalConfig.cs b/ArchiSteamFarm/GlobalConfig.cs
index b4415cde90307..b93ba05189c58 100644
--- a/ArchiSteamFarm/GlobalConfig.cs
+++ b/ArchiSteamFarm/GlobalConfig.cs
@@ -118,6 +118,7 @@ internal static GlobalConfig Load() {
 				case ProtocolType.Udp:
 					break;
 				default:
+					Logging.LogGenericWarning("Configured SteamProtocol is invalid: " + globalConfig.SteamProtocol + ", default TCP protocol will be used instead");
 					globalConfig.SteamProtocol = ProtocolType.Tcp;
 					break;
 			}