diff --git a/slic3r.pl b/slic3r.pl
index 5a70e9d7f..54c295008 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -35,6 +35,7 @@ my %cli_options = ();
         'ignore-nonexistent-config' => \$opt{ignore_nonexistent_config},
         'no-controller'         => \$opt{no_controller},
         'no-plater'             => \$opt{no_plater},
+        'gui-mode=s'            => \$opt{obsolete_ignore_this_option_gui_mode},
         'datadir=s'             => \$opt{datadir},
         'export-svg'            => \$opt{export_svg},
         'merge|m'               => \$opt{merge},