diff --git a/src/Symfony/Component/DependencyInjection/Container.php b/src/Symfony/Component/DependencyInjection/Container.php
index 2d9732b1c1abf..55906725e2c0f 100644
--- a/src/Symfony/Component/DependencyInjection/Container.php
+++ b/src/Symfony/Component/DependencyInjection/Container.php
@@ -61,7 +61,7 @@
  *
  * @api
  */
-class Container implements IntrospectableContainerInterface, ResettableContainerInterface
+class Container implements ResettableContainerInterface
 {
     /**
      * @var ParameterBagInterface
diff --git a/src/Symfony/Component/DependencyInjection/ContainerInterface.php b/src/Symfony/Component/DependencyInjection/ContainerInterface.php
index 39683a6d66751..e610f43f1b874 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerInterface.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerInterface.php
@@ -72,6 +72,15 @@ public function get($id, $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE
      */
     public function has($id);
 
+    /**
+     * Check for whether or not a service has been initialized.
+     *
+     * @param string $id
+     *
+     * @return bool true if the service has been initialized, false otherwise
+     */
+    public function initialized($id);
+
     /**
      * Gets a parameter.
      *
diff --git a/src/Symfony/Component/DependencyInjection/IntrospectableContainerInterface.php b/src/Symfony/Component/DependencyInjection/IntrospectableContainerInterface.php
index e630a1edc6561..36213b3db9e6f 100644
--- a/src/Symfony/Component/DependencyInjection/IntrospectableContainerInterface.php
+++ b/src/Symfony/Component/DependencyInjection/IntrospectableContainerInterface.php
@@ -16,15 +16,10 @@
  * for containers, allowing logic to be implemented based on a Container's state.
  *
  * @author Evan Villemez <evillemez@gmail.com>
+ *
+ * @deprecated Since version 3.0, to be removed in 4.0. Use ContainerInterface
+ *             instead.
  */
 interface IntrospectableContainerInterface extends ContainerInterface
 {
-    /**
-     * Check for whether or not a service has been initialized.
-     *
-     * @param string $id
-     *
-     * @return bool true if the service has been initialized, false otherwise
-     */
-    public function initialized($id);
 }