diff --git a/perl-xCAT/xCAT/FSPconn.pm b/perl-xCAT/xCAT/FSPconn.pm
index 53e67b64a..83845709f 100644
--- a/perl-xCAT/xCAT/FSPconn.pm
+++ b/perl-xCAT/xCAT/FSPconn.pm
@@ -232,7 +232,11 @@ sub mkhwconn_parse_args
     $ppctab->close();
     #$nodetypetab->close();
     $vpdtab->close();
-    
+
+    if ( scalar( @ARGV)) {
+        return(usage( "No additional flag is support by this command" ));
+    }
+
     $request->{method} = 'mkhwconn';
     return( \%opt);
 }
diff --git a/perl-xCAT/xCAT/PPCconn.pm b/perl-xCAT/xCAT/PPCconn.pm
index 48163ea71..dc4a9e97e 100644
--- a/perl-xCAT/xCAT/PPCconn.pm
+++ b/perl-xCAT/xCAT/PPCconn.pm
@@ -187,6 +187,11 @@ sub mkhwconn_parse_args
         return( usage('Wrong value of  --port option. The value can be 0 or 1, and the default value is 0.'));
     }
     $request->{method} = 'mkhwconn';
+    
+    if ( scalar( @ARGV)) {
+        return(usage( "No additional flag is support by this command" ));
+    }
+
     return( \%opt);
 }