diff --git a/src/app/authentication.interceptor.ts b/src/app/authentication.interceptor.ts
index 57b5abb586a5667cf0dc23dfd536193d842e3d5b..bdde6f740035a19ec6839448bac4c34091361ccb 100644
--- a/src/app/authentication.interceptor.ts
+++ b/src/app/authentication.interceptor.ts
@@ -8,6 +8,8 @@ import { Observable } from 'rxjs/Observable';
 
 const AUTH_HEADER_KEY = 'Arsnova-Auth-Token';
 
+const AUTH_HEADER_KEY = 'Arsnova-Auth-Token';
+
 @Injectable()
 export class AuthenticationInterceptor implements HttpInterceptor {