diff --git a/xCAT-server/lib/xcat/plugins/dhcp.pm b/xCAT-server/lib/xcat/plugins/dhcp.pm
index d466dcad0..4d5467320 100644
--- a/xCAT-server/lib/xcat/plugins/dhcp.pm
+++ b/xCAT-server/lib/xcat/plugins/dhcp.pm
@@ -299,8 +299,10 @@ sub preprocess_request
     my $req = shift;
     $callback = shift;
     my $localonly;
-    @ARGV       = @{$req->{arg}};
-    GetOptions('l' => \$localonly);
+    if (ref $req->{arg}) {
+        @ARGV       = @{$req->{arg}};
+        GetOptions('l' => \$localonly);
+    }
     if ($req->{_xcatdest})
     {
         return [$req];