diff --git a/lib/Cake/Network/Email/DebugTransport.php b/lib/Cake/Network/Email/DebugTransport.php
index 5f6ae298d..8ab64e1b0 100644
--- a/lib/Cake/Network/Email/DebugTransport.php
+++ b/lib/Cake/Network/Email/DebugTransport.php
@@ -15,6 +15,7 @@
  * @since         CakePHP(tm) v 2.0.0
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
+App::uses('AbstractTransport', 'Network/Email');
 
 /**
  * Debug Transport class, useful for emulate the email sending process and inspect the resulted
diff --git a/lib/Cake/Network/Email/MailTransport.php b/lib/Cake/Network/Email/MailTransport.php
index 9e27899d3..3b40f21c1 100644
--- a/lib/Cake/Network/Email/MailTransport.php
+++ b/lib/Cake/Network/Email/MailTransport.php
@@ -15,6 +15,7 @@
  * @since         CakePHP(tm) v 2.0.0
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
+App::uses('AbstractTransport', 'Network/Email');
 
 /**
  * Send mail using mail() function
diff --git a/lib/Cake/Network/Email/SmtpTransport.php b/lib/Cake/Network/Email/SmtpTransport.php
index 64d0090b5..c581c9a2f 100644
--- a/lib/Cake/Network/Email/SmtpTransport.php
+++ b/lib/Cake/Network/Email/SmtpTransport.php
@@ -15,7 +15,7 @@
  * @since         CakePHP(tm) v 2.0.0
  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
  */
-
+App::uses('AbstractTransport', 'Network/Email');
 App::uses('CakeSocket', 'Network');
 
 /**