diff --git a/nur_src/ldap/LdapException.php b/nur_src/ldap/LdapException.php
index d8c7800..3f67220 100644
--- a/nur_src/ldap/LdapException.php
+++ b/nur_src/ldap/LdapException.php
@@ -5,10 +5,12 @@ use nur\b\UserException;
 
 class LdapException extends UserException {
   /** @param $r ?resource */
-  static function check(string $message, $r, $value) {
+  static function check(string $message, $r, $value, ?int $allow_errno=null) {
     if ($value !== false) return $value;
     if ($r !== null) {
-      throw new self($message, ldap_errno($r), null, ldap_error($r));
+      $errno = ldap_errno($r);
+      if ($allow_errno !== null && $errno === $allow_errno) return $value;
+      throw new self($message, $errno, null, ldap_error($r));
     } else {
       throw new self($message);
     }
diff --git a/nur_src/ldap/LdapSearch.php b/nur_src/ldap/LdapSearch.php
index 33d8805..956ed10 100644
--- a/nur_src/ldap/LdapSearch.php
+++ b/nur_src/ldap/LdapSearch.php
@@ -157,17 +157,16 @@ class LdapSearch extends Parametrable implements IteratorAggregate {
     elseif ($scope == self::SCOPE_BASE) $rr = @ldap_read(...$args);
     else throw ValueException::invalid_value($scope, "scope");
 
-    // pas trouvé
-    if ($rr === false && ldap_errno($conn) == 32) return;
-    $rr = LdapException::check("search", $conn, $rr);
+    $rr = LdapException::check("search", $conn, $rr, 32);
+    if ($rr === false) return; // pas trouvé
 
     try {
-      $er = LdapException::check("first_entry", $conn, ldap_first_entry($conn, $rr));
+      $er = LdapException::check("first_entry", $conn, ldap_first_entry($conn, $rr), 32);
       while ($er !== false) {
         $dn = ldap_get_dn($conn, $er);
         $entry = ldap_get_attributes($conn, $er);
         yield $dn => $entry;
-        $er = LdapException::check("next_entry", $conn, ldap_next_entry($conn, $er));
+        $er = LdapException::check("next_entry", $conn, ldap_next_entry($conn, $er), 32);
       }
     } catch (StopException $e) {
     } finally {