diff --git a/api/src/middlewares/ErrorHandler.ts b/api/src/middlewares/ErrorHandler.ts
index 34827ca..179c599 100644
--- a/api/src/middlewares/ErrorHandler.ts
+++ b/api/src/middlewares/ErrorHandler.ts
@@ -19,7 +19,7 @@
 			code = error.code;
 			message = error.message;
 			httpcode = error.httpStatus;
-		} else if (error as EntityNotFoundError) {
+		} else if (error instanceof EntityNotFoundError) {
 			message = `${(error as any).stringifyTarget} could not be found`;
 			code = 404;
 		} else if (error instanceof FieldError) {