diff --git a/features/safe-mode.xml b/features/safe-mode.xml
index 0e1f5fc275..c4f709c75f 100644
--- a/features/safe-mode.xml
+++ b/features/safe-mode.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.42 $ -->
+<!-- $Revision: 1.43 $ -->
  <chapter id="features.safe-mode">
   <title>Safe Mode</title>
 
@@ -593,10 +593,18 @@ Warning: readfile() has been disabled for security reasons in
         </entry>
        </row>
        <row>
-        <entry>Any function that uses 
-         <filename>php4/main/fopen_wrappers.c</filename>
-        </entry>
-        <entry>??</entry>
+        <entry>
+	 <function>mail</function>
+	</entry>
+	<entry>
+	 In safe mode, the fifth parameter is disabled. (note: only affected since PHP 4.2.3)
+	</entry>
+       </row>
+       <row>
+        <entry>Any function that uses
+	 <filename>php4/main/fopen_wrappers.c</filename>
+	</entry>
+	<entry>??</entry>
        </row>
       </tbody>
      </tgroup>