diff --git a/src/app/app-config.service.ts b/src/app/app-config.service.ts
index aadd8006..d4b7e171 100644
--- a/src/app/app-config.service.ts
+++ b/src/app/app-config.service.ts
@@ -50,7 +50,8 @@ export class AppConfigService {
       }
     }
     // Use old default if not provided
-    this.appConfig.logoWidth = this.appConfig.logoWidth ?? "412";
+
+    (this.appConfig as AppConfig).logoWidth = (this.appConfig as AppConfig).logoWidth ?? "412";
   }
 
   getConfig(): AppConfig {