diff --git a/api-gateway/src/helpers/interceptors/utils/hash.ts b/api-gateway/src/helpers/interceptors/utils/hash.ts
index 0c14e7029..637911ee6 100644
--- a/api-gateway/src/helpers/interceptors/utils/hash.ts
+++ b/api-gateway/src/helpers/interceptors/utils/hash.ts
@@ -4,5 +4,5 @@ import crypto from 'crypto';
 import {IAuthUser} from '@guardian/common';
 
 export function getHash(user: IAuthUser | null): string {
-    return crypto.createHash('md5').update(JSON.stringify(user.id ?? 'anonymous')).digest('hex');
+    return crypto.createHash('md5').update(JSON.stringify(user?.id ?? 'anonymous')).digest('hex');
 }