diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index 31292a347..ac01283c3 100644
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -1286,7 +1286,8 @@ nics => {
                 If multiple ip addresses are associated with each NIC:
                     <nic1>!<network1>|<network2>,<nic2>!<network1>|<network2>, for example, eth0!10_0_0_0-255_255_0_0|fd55:faaf:e1ab:336::/64,ib0!11_0_0_0-255_255_0_0|2001:db8:1:0::/64. The xCAT object definition commands support to use nicnetworks.<nicname> as the sub attributes.',
             nicaliases => 'Comma-separated list of aliases for each NIC.
-            Format: eth0!<alias>,eth1!<alias1>|<alias2>
+            Format: eth0!<alias list>,eth1!<alias1 list>|<alias2 list>
+			For multiple aliases per nic use a space-separated list.
             For example: eth0!moe larry curly,eth1!tom|jerry',
             comments => 'Any user-written notes.',
             disable => "Set to 'yes' or '1' to comment out this row.",