diff --git a/app/Config/core.php b/app/Config/core.php
index 99198539f..e0527538d 100644
--- a/app/Config/core.php
+++ b/app/Config/core.php
@@ -42,7 +42,8 @@
  * Options:
  *
  * - `handler` - callback - The callback to handle errors. You can set this to any callable type,
- *    including anonymous functions.
+ *   including anonymous functions.
+ *   Make sure you add App::uses('MyHandler', 'Error'); when using a custom handler class
  * - `level` - int - The level of errors you are interested in capturing.
  * - `trace` - boolean - Include stack traces for errors in log files.
  *
@@ -64,6 +65,7 @@
  *
  * - `handler` - callback - The callback to handle exceptions. You can set this to any callback type,
  *   including anonymous functions.
+ *   Make sure you add App::uses('MyHandler', 'Error'); when using a custom handler class
  * - `renderer` - string - The class responsible for rendering uncaught exceptions.  If you choose a custom class you
  *   should place the file for that class in app/Lib/Error. This class needs to implement a render method.
  * - `log` - boolean - Should Exceptions be logged?
diff --git a/lib/Cake/Console/Templates/skel/Config/core.php b/lib/Cake/Console/Templates/skel/Config/core.php
index 7720e9ed6..14ad6976b 100644
--- a/lib/Cake/Console/Templates/skel/Config/core.php
+++ b/lib/Cake/Console/Templates/skel/Config/core.php
@@ -42,7 +42,8 @@
  * Options:
  *
  * - `handler` - callback - The callback to handle errors. You can set this to any callable type,
- *    including anonymous functions.
+ *   including anonymous functions.
+ *   Make sure you add App::uses('MyHandler', 'Error'); when using a custom handler class
  * - `level` - int - The level of errors you are interested in capturing.
  * - `trace` - boolean - Include stack traces for errors in log files.
  *
@@ -64,6 +65,7 @@
  *
  * - `handler` - callback - The callback to handle exceptions. You can set this to any callback type,
  *   including anonymous functions.
+ *   Make sure you add App::uses('MyHandler', 'Error'); when using a custom handler class
  * - `renderer` - string - The class responsible for rendering uncaught exceptions.  If you choose a custom class you
  *   should place the file for that class in app/Lib/Error. This class needs to implement a render method.
  * - `log` - boolean - Should Exceptions be logged?