diff --git a/library/Icinga/Protocol/Ldap/Connection.php b/library/Icinga/Protocol/Ldap/Connection.php
index 038a45c42..966dd2667 100644
--- a/library/Icinga/Protocol/Ldap/Connection.php
+++ b/library/Icinga/Protocol/Ldap/Connection.php
@@ -113,7 +113,7 @@ class Connection implements Selectable
         return $this->port;
     }
 
-    public function getDN()
+    public function getDn()
     {
         return $this->root_dn;
     }
diff --git a/library/Icinga/Protocol/Ldap/Query.php b/library/Icinga/Protocol/Ldap/Query.php
index fe6539515..62433886a 100644
--- a/library/Icinga/Protocol/Ldap/Query.php
+++ b/library/Icinga/Protocol/Ldap/Query.php
@@ -156,7 +156,7 @@ class Query extends SimpleQuery
     {
         $result = $this->fetchAll();
         $sorted = array();
-        $quotedDn = preg_quote($this->ds->getDN(), '/');
+        $quotedDn = preg_quote($this->ds->getDn(), '/');
         foreach ($result as $key => & $item) {
             $new_key = LdapUtils::implodeDN(
                 array_reverse(
diff --git a/library/Icinga/Protocol/Ldap/Root.php b/library/Icinga/Protocol/Ldap/Root.php
index 769437a31..5f1fb545d 100644
--- a/library/Icinga/Protocol/Ldap/Root.php
+++ b/library/Icinga/Protocol/Ldap/Root.php
@@ -215,7 +215,7 @@ class Root
      */
     public function getDN()
     {
-        return $this->connection->getDN();
+        return $this->connection->getDn();
     }
 
     /**