diff --git a/perl-xCAT/xCAT/PPCconn.pm b/perl-xCAT/xCAT/PPCconn.pm
index 71d935911..19c36bfd2 100644
--- a/perl-xCAT/xCAT/PPCconn.pm
+++ b/perl-xCAT/xCAT/PPCconn.pm
@@ -98,6 +98,12 @@ sub mkhwconn_parse_args
             {
                 push @no_type_nodes, $node;
                 next;
+            } else
+            {
+                unless ( $nodetype =~ /^(fsp|bpa|frame|cec|hmc)$/)
+                {
+                     return ( usage("Node type is incorrect. \n"));
+                }
             }
 
             if ( $nodetype eq 'fsp' )