diff --git a/lib/web/auth/ldap/index.js b/lib/web/auth/ldap/index.js
index c6746473b..1a5c99389 100644
--- a/lib/web/auth/ldap/index.js
+++ b/lib/web/auth/ldap/index.js
@@ -37,7 +37,7 @@ passport.use(new LDAPStrategy({
     id: 'LDAP-' + uuid,
     username: username,
     displayName: user.displayName,
-    emails: user.mail ? [user.mail] : [],
+    emails: user.mail ? Array.isArray(user.mail) ? user.mail : [user.mail] : [],
     avatarUrl: null,
     profileUrl: null,
     provider: 'ldap'