diff --git a/src/Symfony/Component/DependencyInjection/Definition.php b/src/Symfony/Component/DependencyInjection/Definition.php
index ed5976ffd2..26e3a1516c 100644
--- a/src/Symfony/Component/DependencyInjection/Definition.php
+++ b/src/Symfony/Component/DependencyInjection/Definition.php
@@ -451,6 +451,22 @@ class Definition
         return isset($this->tags[$name]);
     }
 
+    /**
+     * Clears all tags for a given name.
+     *
+     * @param string $name The tag name
+     *
+     * @return Definition
+     */
+    public function clearTag($name)
+    {
+        if (isset($this->tags[$name])) {
+            unset($this->tags[$name]);
+        }
+
+        return $this;
+    }
+
     /**
      * Clears the tags for this definition.
      *
diff --git a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
index dba19f3ac9..46ea75d5cd 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
@@ -187,6 +187,25 @@ class DefinitionTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(array(), $def->getTags(), '->clearTags() removes all current tags');
     }
 
+    /**
+     * @covers Symfony\Component\DependencyInjection\Definition::clearTags
+     */
+    public function testClearTag()
+    {
+        $def = new Definition('stdClass');
+        $this->assertSame($def, $def->clearTags(), '->clearTags() implements a fluent interface');
+        $def->addTag('1foo1', array('foo1' => 'bar1'));
+        $def->addTag('2foo2', array('foo2' => 'bar2'));
+        $def->addTag('3foo3', array('foo3' => 'bar3'));
+        $def->clearTag('2foo2');
+        $this->assertTrue($def->hasTag('1foo1'));
+        $this->assertFalse($def->hasTag('2foo2'));
+        $this->assertTrue($def->hasTag('3foo3'));
+        $def->clearTag('1foo1');
+        $this->assertFalse($def->hasTag('1foo1'));
+        $this->assertTrue($def->hasTag('3foo3'));
+    }
+
     /**
      * @covers Symfony\Component\DependencyInjection\Definition::addTag
      * @covers Symfony\Component\DependencyInjection\Definition::getTag