diff --git a/src/core/configuration/DevConfig.ts b/src/core/configuration/DevConfig.ts
index 4133a9620..9da20511a 100644
--- a/src/core/configuration/DevConfig.ts
+++ b/src/core/configuration/DevConfig.ts
@@ -44,7 +44,7 @@ export class DevConfig extends DefaultConfig {
   constructor(
     sc: ServerConfig,
     gc: GameConfig,
-    us: UserSettings,
+    us: UserSettings | null,
     isReplay: boolean,
   ) {
     super(sc, gc, us, isReplay);