diff --git a/reference/spl/arrayiterator.xml b/reference/spl/arrayiterator.xml
index ef7cf4c27c..99ac373354 100644
--- a/reference/spl/arrayiterator.xml
+++ b/reference/spl/arrayiterator.xml
@@ -54,6 +54,10 @@
      <oointerface>
       <interfacename>Countable</interfacename>
      </oointerface>
+
+     <oointerface>
+      <interfacename>Serializable</interfacename>
+     </oointerface>
  
     </classsynopsisinfo>
 <!-- }}} -->