diff --git a/Clim/Context.php b/Clim/Context.php
index c182306..9d52cf7 100644
--- a/Clim/Context.php
+++ b/Clim/Context.php
@@ -107,4 +107,18 @@ public function setResult($result)
     {
         $this->result = $result;
     }
+
+    /**
+     * @param callable $callable
+     * @return mixed
+     */
+    public function execute(callable $callable)
+    {
+        $options = new Hash($this->options());
+        $arguments = new Hash($this->arguments());
+
+        $result = call_user_func_array($callable, [$options, $arguments]);
+        if (!is_null($result)) $this->setResult($result);
+        return $result;
+    }
 }
diff --git a/Clim/Dispatcher.php b/Clim/Dispatcher.php
index 6b4a075..12242b9 100644
--- a/Clim/Dispatcher.php
+++ b/Clim/Dispatcher.php
@@ -18,6 +18,8 @@ class Dispatcher extends Component implements ArgumentInterface
     /** @var ContainerInterface $container */
     private $container;
 
+    /** @var array */
+    private $map;
     /**
      * @param string $definition
      * @param array $children
@@ -31,17 +33,24 @@ public function __construct($definition, array $children, ContainerInterface $co
 
         $this->children = $children;
         $this->container = $container;
+        $this->map = [];
+        foreach (array_keys($this->children) as $key) {
+            $keys = explode('|', $key);
+            foreach ($keys as $name) {
+                $this->map[$name] = $children[$key];
+            }
+        }
     }
 
     public function handle($argument, Parameters $parameters, Context $context)
     {
         $this->needDefined();
 
-        if (!array_key_exists($argument, $this->children)) {
-            throw new \Exception("invalid sub command");
+        if (!array_key_exists($argument, $this->map)) {
+            throw new \Exception("invalid sub command: " . $argument);
         }
 
-        $builder = $this->children[$argument];
+        $builder = $this->map[$argument];
         $child = new App($this->container);
 
         call_user_func($builder, $child);
diff --git a/Clim/Runner.php b/Clim/Runner.php
index 973a2f2..e102b10 100644
--- a/Clim/Runner.php
+++ b/Clim/Runner.php
@@ -59,11 +59,8 @@ public function run($argv, Context $context = null)
                 $context->push($this->parameters->next());
             }
 
-            $options = new Hash($context->options());
-            $arguments = new Hash($context->arguments());
-
             foreach ($this->spec->tasks() as $task) {
-                call_user_func($task, $options, $arguments);
+                $context->execute($task);
             }
 
             return $context;
diff --git a/tests/unit/DispatchCept.php b/tests/unit/DispatchCept.php
index d2a05af..6c60886 100644
--- a/tests/unit/DispatchCept.php
+++ b/tests/unit/DispatchCept.php
@@ -1,11 +1,12 @@
 <?php
 
 use Clim\App;
+use Clim\Context;
 
 $I = new UnitTester($scenario);
 $I->wantTo('perform dispatch and see the result');
 
-$app = new Clim\App(['name' => 'Kashiyuka']);
+$app = new App(['name' => 'Kashiyuka']);
 
 // global option
 $app->option('--age {AGE|\\d+}');
@@ -34,3 +35,18 @@
 $I->willPassArguments($app, ['hello_dispatch', 'bar']);
 $I->assertOutputEquals($app, "BAR\n");
 
+$app = new App();
+$app->dispatch('{COMMAND}', [
+    'ls|list' => function (App $app) {
+        $app->task(function () {
+            return 'HELLO';
+        });
+    }
+]);
+
+$context = $app->runner()->run(['ls']);
+$I->assertEquals('HELLO', $context->getResult());
+
+$context = $app->runner()->run(['list']);
+$I->assertEquals('HELLO', $context->getResult());
+