diff --git a/backend/src/controllers/atemschutz.controller.ts b/backend/src/controllers/atemschutz.controller.ts
index 0272b58..20b1c09 100644
--- a/backend/src/controllers/atemschutz.controller.ts
+++ b/backend/src/controllers/atemschutz.controller.ts
@@ -160,7 +160,7 @@ class AtemschutzController {
     }
   }
 
-  async getExpiring(req: Request, res: Response): Promise<void> {
+  async getExpiring(_req: Request, res: Response): Promise<void> {
     try {
       const expiring = await atemschutzService.getExpiringCertifications(30);