diff --git a/xCAT-server-2.0/share/xcat/cons/hmc b/xCAT-server-2.0/share/xcat/cons/hmc
index 8b18abf2d..5e09aede6 100644
--- a/xCAT-server-2.0/share/xcat/cons/hmc
+++ b/xCAT-server-2.0/share/xcat/cons/hmc
@@ -169,7 +169,7 @@ sub invoke_cmd {
     # Check for valid "type"
     #################################
     my @types = split /,/, $ent->{nodetype};
-    my ($type) = grep( /^lpar|osi$/, @types );
+    my ($type) = grep( /^(lpar|osi)$/, @types );
 
     if ( !defined( $type )) {
         return( "Invalid node type: $ent->{nodetype}" );