diff --git a/perl-xCAT/xCAT/Schema.pm b/perl-xCAT/xCAT/Schema.pm
index 8a0639ea4..ca8a258c6 100755
--- a/perl-xCAT/xCAT/Schema.pm
+++ b/perl-xCAT/xCAT/Schema.pm
@@ -1129,7 +1129,7 @@ passed as argument rather than by table value',
 "                prefix (e.g. 00:11:aa)\n\n" .
 " genpasswords:  Automatically generate random passwords for BMCs when configuring\n" .
 "                them.\n\n" .
-" installdir:  The local directory name used to hold the node deployment packages.\n\n" .
+" installdir:  The local directory name used to hold the node deployment packages.  This path must start with / and be fully qualified.\n\n" .
 " installloc:  The location from which the service nodes should mount the \n" .
 "              deployment packages in the format hostname:/path.  If hostname is\n" .
 "              omitted, it defaults to the management node. The path must\n" .