diff --git a/website/server/libs/auth/social.js b/website/server/libs/auth/social.js
index 7758b39f1e..d234ec632e 100644
--- a/website/server/libs/auth/social.js
+++ b/website/server/libs/auth/social.js
@@ -98,7 +98,7 @@ export async function loginSocial (req, res) { // eslint-disable-line import/pre
     throw new NotFound(res.t('userNotFound'));
   }
 
-  sanitizedUsername = username.replace(/[^a-zA-Z0-9_-]/g, '');
+  let sanitizedUsername = username.replace(/[^a-zA-Z0-9_-]/g, '');
   if (!sanitizedUsername) {
     sanitizedUsername = generateUsername();
   }