diff --git a/reference/session/functions/session-set-save-handler.xml b/reference/session/functions/session-set-save-handler.xml
index 7a88a33713..68819cbf78 100644
--- a/reference/session/functions/session-set-save-handler.xml
+++ b/reference/session/functions/session-set-save-handler.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.16 $ -->
+<!-- $Revision: 1.17 $ -->
 <refentry id="function.session-set-save-handler">
  <refnamediv>
   <refname>session_set_save_handler</refname>
@@ -189,6 +189,9 @@ session_start();
     is possible to call <function>session_write_close</function> from the
     destructor to solve this chicken and egg problem.
    </para>
+   <para>
+    Write and Close handlers cannot throw exceptions. 
+   </para>
   </warning>
  </refsect1>