diff --git a/reference/session/functions/session-set-save-handler.xml b/reference/session/functions/session-set-save-handler.xml
index 0db8585cbb..392aea94f1 100644
--- a/reference/session/functions/session-set-save-handler.xml
+++ b/reference/session/functions/session-set-save-handler.xml
@@ -65,6 +65,9 @@
      <term><parameter>write</parameter></term>
      <listitem>
       <para>
+       Write function that is called when session data is to be saved in. This
+       function expects two parameters: an identifier and the data associated
+       with it.
        <note>
         <para>
          The "write" handler is not executed until after the output stream is