diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index e26876843..58208b1a5 100644
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -1034,7 +1034,7 @@ site => {
    "               rsh/rcp will be setup and used on AIX. Default is yes.\n\n".
    " useflowcontrol:  (yes/1 or no/0).If yes, postscripts use xcatd to control access to the server.\n".
    "               If no, postscripts sleep and retry. On a new install, it will be set to yes.\n".
-   "               Works with xcatmaxconnections and xcatmaxbatch connections attributes.\n".
+   "               Works with xcatmaxconnections and xcatmaxbatch connections attributes. Is not supported on AIX.\n".
    "               See the following documentation for details. https://sourceforge.net/apps/mediawiki/xcat/index.php?title=Hints_and_Tips_for_Large_Scale_Clusters\n\n".
    " useNFSv4onAIX:  (yes/1 or no/0). If yes, NFSv4 will be used with NIM. If no,\n".
    "               NFSv3 will be used with NIM. Default is no.\n\n".