diff --git a/phpBB/install/install_update.php b/phpBB/install/install_update.php
index 6184cbbc33..ec76f2a407 100644
--- a/phpBB/install/install_update.php
+++ b/phpBB/install/install_update.php
@@ -193,13 +193,13 @@ class install_update extends module
 		}
 
 		// Check if the update files are actually meant to update from the current version
-		if ($config['version'] != $this->update_info['version']['from'])
+		if ($this->current_version != $this->update_info['version']['from'])
 		{
 			$this->unequal_version = true;
 
 			$template->assign_vars(array(
 				'S_ERROR'	=> true,
-				'ERROR_MSG'	=> sprintf($user->lang['INCOMPATIBLE_UPDATE_FILES'], $config['version'], $this->update_info['version']['from'], $this->update_info['version']['to']),
+				'ERROR_MSG'	=> sprintf($user->lang['INCOMPATIBLE_UPDATE_FILES'], $this->current_version, $this->update_info['version']['from'], $this->update_info['version']['to']),
 			));
 		}