diff --git a/packages/authentication/src/services/token/index.js b/packages/authentication/src/services/token/index.js
index c10ce99b34..51fed32087 100644
--- a/packages/authentication/src/services/token/index.js
+++ b/packages/authentication/src/services/token/index.js
@@ -94,7 +94,7 @@ export class Service {
     const options = this.options;
 
     const data = {
-      id: user[options.idField] || user.id
+      id: user.hasOwnProperty(options.idField) ? user[options.idField] : user.id
     };
 
     if (Array.isArray(options.extraFields)) {