diff --git a/src/Service/LDAPApi.php b/src/Service/LDAPApi.php
index 8b68ca64eb185ee748646af1321d8dba8cf9fbcb..aaca73536413f6e248ef5bac706823aebef7b848 100644
--- a/src/Service/LDAPApi.php
+++ b/src/Service/LDAPApi.php
@@ -260,7 +260,7 @@ class LDAPApi implements LoggerAwareInterface, ServiceSubscriberInterface
         $person->setFamilyName($user->getFirstAttribute($this->familyNameAttributeName));
 
         if ($this->emailAttributeName !== '') {
-            $person->setEmail($user->getFirstAttribute($this->emailAttributeName));
+            $person->setEmail($user->getFirstAttribute($this->emailAttributeName) ?? '');
         }
 
         $birthDateString = $this->birthdayAttributeName !== '' ?