diff --git a/reference/apc/ini.xml b/reference/apc/ini.xml
index df5c08829b..aaccdd8b1a 100644
--- a/reference/apc/ini.xml
+++ b/reference/apc/ini.xml
@@ -178,6 +178,12 @@
       <entry>PHP_INI_SYSTEM</entry>
       <entry>Available since APC 3.0.11.</entry>
      </row>
+     <row>
+      <entry><link linkend="ini.apc.serializer">apc.serializer</link></entry>
+      <entry>"default"</entry>
+      <entry>PHP_INI_SYSTEM</entry>
+      <entry>Available since APC 3.1.0.</entry>
+     </row>
      <row>
       <entry><link linkend="ini.apc.include-once-override">apc.include_once_override</link></entry>
       <entry>"0"</entry>
@@ -631,6 +637,18 @@
     </listitem>
    </varlistentry>
    
+   <varlistentry xml:id="ini.apc.serializer">
+    <term>
+     <parameter>apc.serializer</parameter>
+     <type>string</type>
+    </term>
+    <listitem>
+     <para>
+      Used to configure APC to use a third party serializer.
+     </para>
+    </listitem>
+   </varlistentry>
+   
    <varlistentry xml:id="ini.apc.include-once-override">
     <term>
      <parameter>apc.include_once_override</parameter>