diff --git a/src/Symfony/Component/HttpKernel/Debug/ErrorHandler.php b/src/Symfony/Component/HttpKernel/Debug/ErrorHandler.php
index 2718f891df2d..38203d4adf7f 100644
--- a/src/Symfony/Component/HttpKernel/Debug/ErrorHandler.php
+++ b/src/Symfony/Component/HttpKernel/Debug/ErrorHandler.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\Debug;
 
+trigger_error('Symfony\Component\HttpKernel\Debug\ErrorHandler is deprecated since version 2.3 and will be removed in 3.0. Use the same class from the Debug component instead.', E_USER_DEPRECATED);
+
 use Symfony\Component\Debug\ErrorHandler as DebugErrorHandler;
 
 /**
diff --git a/src/Symfony/Component/HttpKernel/Debug/ExceptionHandler.php b/src/Symfony/Component/HttpKernel/Debug/ExceptionHandler.php
index 581e29cd8498..7e31b090c284 100644
--- a/src/Symfony/Component/HttpKernel/Debug/ExceptionHandler.php
+++ b/src/Symfony/Component/HttpKernel/Debug/ExceptionHandler.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\Debug;
 
+trigger_error('Symfony\Component\HttpKernel\Debug\ExceptionHandler is deprecated since version 2.3 and will be removed in 3.0. Use the same class from the Debug component instead.', E_USER_DEPRECATED);
+
 use Symfony\Component\Debug\ExceptionHandler as DebugExceptionHandler;
 
 /**
diff --git a/src/Symfony/Component/HttpKernel/Exception/FatalErrorException.php b/src/Symfony/Component/HttpKernel/Exception/FatalErrorException.php
index 1f1ef1a276a9..adf62289167f 100644
--- a/src/Symfony/Component/HttpKernel/Exception/FatalErrorException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/FatalErrorException.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\Exception;
 
+trigger_error('Symfony\Component\HttpKernel\Exception\FatalErrorException is deprecated since version 2.3 and will be removed in 3.0. Use the same class from the Debug component instead.', E_USER_DEPRECATED);
+
 use Symfony\Component\Debug\Exception\FatalErrorException as DebugFatalErrorException;
 
 /**
diff --git a/src/Symfony/Component/HttpKernel/Exception/FlattenException.php b/src/Symfony/Component/HttpKernel/Exception/FlattenException.php
index 0168afca169d..6c8661b13e1b 100644
--- a/src/Symfony/Component/HttpKernel/Exception/FlattenException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/FlattenException.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\HttpKernel\Exception;
 
+trigger_error('Symfony\Component\HttpKernel\Exception\FlattenException is deprecated since version 2.3 and will be removed in 3.0. Use the same class from the Debug component instead.', E_USER_DEPRECATED);
+
 use Symfony\Component\Debug\Exception\FlattenException as DebugFlattenException;
 
 /**