diff --git a/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php b/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php
index 44328fc89..c8430811e 100644
--- a/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php
+++ b/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php
@@ -79,7 +79,7 @@ class XmlExporter extends AbstractExporter
             $discriminatorColumnXml = $root->addChild('discriminator-column');
             $discriminatorColumnXml->addAttribute('name', $metadata->discriminatorColumn['name']);
             $discriminatorColumnXml->addAttribute('type', $metadata->discriminatorColumn['type']);
-            if(isset($metadata->discriminatorColumn['length'])){
+            if (isset($metadata->discriminatorColumn['length'])) {
                 $discriminatorColumnXml->addAttribute('length', $metadata->discriminatorColumn['length']);
             }
         }