diff --git a/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php b/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
index 24b15d97ad..b43b88d98d 100644
--- a/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
@@ -26,8 +26,8 @@ class CustomFilterIterator extends FilterIterator
     /**
      * Constructor.
      *
-     * @param \Iterator $iterator The Iterator to filter
-     * @param array     $filters  An array of PHP callbacks
+     * @param \Iterator  $iterator The Iterator to filter
+     * @param callable[] $filters  An array of PHP callbacks
      *
      * @throws \InvalidArgumentException
      */
diff --git a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
index d3bc6ad2e8..fbdc993036 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
@@ -145,7 +145,7 @@ class ControllerResolver implements ControllerResolverInterface
      *
      * @param string $controller A Controller string
      *
-     * @return mixed A PHP callable
+     * @return callable A PHP callable
      *
      * @throws \InvalidArgumentException
      */
diff --git a/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php b/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php
index b61999cd6d..77a5c1a2ad 100644
--- a/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php
+++ b/src/Symfony/Component/HttpKernel/Event/FilterControllerEvent.php
@@ -29,8 +29,6 @@ class FilterControllerEvent extends KernelEvent
 {
     /**
      * The current controller.
-     *
-     * @var callable
      */
     private $controller;
 
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index ec5d211e40..64f6d15cb9 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -1015,7 +1015,7 @@ class Process
      *
      * @param callback|null $callback The user defined PHP callback
      *
-     * @return callback A PHP callable
+     * @return \Closure A PHP closure
      */
     protected function buildCallback($callback)
     {
diff --git a/src/Symfony/Component/Templating/PhpEngine.php b/src/Symfony/Component/Templating/PhpEngine.php
index 93da75bf35..bf3261b18e 100644
--- a/src/Symfony/Component/Templating/PhpEngine.php
+++ b/src/Symfony/Component/Templating/PhpEngine.php
@@ -354,8 +354,8 @@ class PhpEngine implements EngineInterface, \ArrayAccess
     /**
      * Adds an escaper for the given context.
      *
-     * @param string $context The escaper context (html, js, ...)
-     * @param mixed  $escaper A PHP callable
+     * @param string   $context The escaper context (html, js, ...)
+     * @param callable $escaper A PHP callable
      */
     public function setEscaper($context, $escaper)
     {
@@ -368,7 +368,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
      *
      * @param string $context The context name
      *
-     * @return mixed $escaper A PHP callable
+     * @return callable $escaper A PHP callable
      *
      * @throws \InvalidArgumentException
      */
diff --git a/src/Symfony/Component/Translation/PluralizationRules.php b/src/Symfony/Component/Translation/PluralizationRules.php
index 4264e5c802..6d91da7fc6 100644
--- a/src/Symfony/Component/Translation/PluralizationRules.php
+++ b/src/Symfony/Component/Translation/PluralizationRules.php
@@ -190,8 +190,8 @@ class PluralizationRules
     /**
      * Overrides the default plural rule for a given locale.
      *
-     * @param string $rule   A PHP callable
-     * @param string $locale The locale
+     * @param callable $rule   A PHP callable
+     * @param string   $locale The locale
      *
      * @throws \LogicException
      */