diff --git a/Puc/v4/Plugin/UpdateChecker.php b/Puc/v4/Plugin/UpdateChecker.php
index b56b86a..ca0604d 100644
--- a/Puc/v4/Plugin/UpdateChecker.php
+++ b/Puc/v4/Plugin/UpdateChecker.php
@@ -9,7 +9,6 @@ if ( !class_exists('Puc_v4_Plugin_UpdateChecker', false) ):
 	 * @access public
 	 */
 	class Puc_v4_Plugin_UpdateChecker extends Puc_v4_UpdateChecker {
-		protected $updateClass = 'Puc_v4_Plugin_Update';
 		protected $updateTransient = 'update_plugins';
 		protected $translationType = 'plugin';
 
diff --git a/Puc/v4/Theme/UpdateChecker.php b/Puc/v4/Theme/UpdateChecker.php
index 56d0448..dbf4245 100644
--- a/Puc/v4/Theme/UpdateChecker.php
+++ b/Puc/v4/Theme/UpdateChecker.php
@@ -4,7 +4,6 @@ if ( !class_exists('Puc_v4_Theme_UpdateChecker', false) ):
 
 	class Puc_v4_Theme_UpdateChecker extends Puc_v4_UpdateChecker {
 		protected $filterSuffix = 'theme';
-		protected $updateClass = 'Puc_v4_Theme_Update';
 		protected $updateTransient = 'update_themes';
 		protected $translationType = 'theme';
 
diff --git a/Puc/v4/UpdateChecker.php b/Puc/v4/UpdateChecker.php
index f60313b..77ddec5 100644
--- a/Puc/v4/UpdateChecker.php
+++ b/Puc/v4/UpdateChecker.php
@@ -4,7 +4,6 @@ if ( !class_exists('Puc_v4_UpdateChecker', false) ):
 
 	abstract class Puc_v4_UpdateChecker {
 		protected $filterSuffix = '';
-		protected $updateClass = '';
 		protected $updateTransient = '';
 		protected $translationType = ''; //"plugin" or "theme".