diff --git a/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php b/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php
index a405776ed..14ff8322d 100644
--- a/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php
+++ b/lib/Doctrine/ORM/Tools/Export/Driver/XmlExporter.php
@@ -398,13 +398,14 @@ class XmlExporter extends AbstractExporter
     private function exportTableOptions(\SimpleXMLElement $parentXml, array $options)
     {
         foreach ($options as $name => $option) {
-            $optionXml = is_array($option)
+            $isArray   = is_array($option);
+            $optionXml = $isArray
                 ? $parentXml->addChild('option')
                 : $parentXml->addChild('option', (string) $option);
 
             $optionXml->addAttribute('name', (string) $name);
 
-            if (is_array($option)) {
+            if ($isArray) {
                 $this->exportTableOptions($optionXml, $option);
             }
         }