diff --git a/DepotDownloader/ContentDownloader.cs b/DepotDownloader/ContentDownloader.cs
index d5a920a2..27370a9b 100644
--- a/DepotDownloader/ContentDownloader.cs
+++ b/DepotDownloader/ContentDownloader.cs
@@ -340,7 +340,7 @@ namespace DepotDownloader
                     Username = username,
                     Password = password,
                     ShouldRememberPassword = Config.RememberPassword,
-                    LoginKey = ConfigStore.TheConfig.LoginKeys.ContainsKey(username) ? ConfigStore.TheConfig.LoginKeys[username] : null,
+                    LoginKey = username != null && ConfigStore.TheConfig.LoginKeys.ContainsKey(username) ? ConfigStore.TheConfig.LoginKeys[username] : null,
                 }
             );