diff --git a/reference/var/functions/serialize.xml b/reference/var/functions/serialize.xml
index 4b637f3eaa..a19b3b6826 100644
--- a/reference/var/functions/serialize.xml
+++ b/reference/var/functions/serialize.xml
@@ -34,7 +34,7 @@
      <listitem>
       <para>
        The value to be serialized. <function>serialize</function>
-       handles all types, except the <type>resource</type>-type.
+       handles all types, except the <type>resource</type>-type and some <type>object</type>s (see note below).
        You can even <function>serialize</function> arrays that contain
        references to itself. Circular references inside the array/object you 
        are serializing will also be stored. Any other