diff --git a/functions/imap.xml b/functions/imap.xml
index 28e90d7218..9e26bec7a5 100644
--- a/functions/imap.xml
+++ b/functions/imap.xml
@@ -8,7 +8,7 @@
      instead -->
      
      <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.63 $ -->
+<!-- $Revision: 1.64 $ -->
  <reference id='ref.imap'>
   <title>IMAP, POP3 and NNTP functions</title>
   <titleabbrev>IMAP</titleabbrev>
@@ -2006,6 +2006,14 @@ imap_close($mbox);
     <para>
      &warn.undocumented.func;
     </para>
+    <note>
+    <para>
+    This function requires special support from the imap server and is not
+    generally available.  Read your imap server's source code and verify that
+    the OP_RELOGIN mechanism is available then define OP_RELOGIN in ext/imap.c
+    and recompile this extension if you want to use this function.
+    </para>
+    </note>
    </refsect1>
   </refentry>