diff --git a/src/app/Console/Commands/Data/MigrateCommand.php b/src/app/Console/Commands/Data/MigrateCommand.php
index e3238c01..78b9080a 100644
--- a/src/app/Console/Commands/Data/MigrateCommand.php
+++ b/src/app/Console/Commands/Data/MigrateCommand.php
@@ -1,72 +1,72 @@
 <?php
 
 namespace App\Console\Commands\Data;
 
 use App\DataMigrator;
 use Illuminate\Console\Command;
 
 /**
  * Migrate user data from an external service to Kolab.
  *
  * Example usage:
  *
  * ```
  * php artisan data:migrate \
  *   "ews://$user@$server?client_id=$client_id&client_secret=$client_secret&tenant_id=$tenant_id" \
  *   "dav://$dest_user:$dest_pass@$dest_server"
  * ```
  *
  * Supported account types: ews, dav (davs), imap (tls, ssl, imaps)
  */
 class MigrateCommand extends Command
 {
     /**
      * The name and signature of the console command.
      *
      * @var string
      */
     protected $signature = 'data:migrate
                                 {src : Source account}
                                 {dst : Destination account}
                                 {--type= : Object type(s)}
                                 {--sync : Execute migration synchronously}
                                 {--force : Force existing queue removal}
-                                {--folder-mapping= : Folder mapping in the form "source:target"}';
+                                {--folder-mapping=* : Folder mapping in the form "source:target"}';
 //                                {--export-only : Only export data}
 //                                {--import-only : Only import previously exported data}';
 
     /**
      * The console command description.
      *
      * @var string
      */
     protected $description = 'Migrate user data from an external service';
 
     /**
      * Execute the console command.
      *
      * @return mixed
      */
     public function handle()
     {
         $src = new DataMigrator\Account($this->argument('src'));
         $dst = new DataMigrator\Account($this->argument('dst'));
 
         $folderMapping = [];
         foreach ($this->option('folder-mapping') as $mapping) {
             $arr = explode(":", $mapping);
             $folderMapping[$arr[0]] = $arr[1];
         }
 
         $options = [
             'type' => $this->option('type'),
             'force' => $this->option('force'),
             'sync' => $this->option('sync'),
             'folderMapping' => $folderMapping,
             'stdout' => true,
         ];
 
         $migrator = new DataMigrator\Engine();
         $migrator->migrate($src, $dst, $options);
     }
 }