diff --git a/typo3/sysext/install/Classes/Controller/Action/AbstractAction.php b/typo3/sysext/install/Classes/Controller/Action/AbstractAction.php
index 7f9fdb5022b244e0b30a422dc55b7f364db6ecd6..01f7032ae53b07122189b7bfb1c835ee6c667b3e 100644
--- a/typo3/sysext/install/Classes/Controller/Action/AbstractAction.php
+++ b/typo3/sysext/install/Classes/Controller/Action/AbstractAction.php
@@ -102,7 +102,7 @@ abstract class AbstractAction implements ActionInterface {
 	/**
 	 * Initialize the handle action, sets up fluid stuff and assigns default variables.
 	 *
-	 * @return string content
+	 * @return void
 	 */
 	protected function initializeHandle() {
 		/** @var \TYPO3\CMS\Install\Status\StatusUtility $statusUtility */
diff --git a/typo3/sysext/install/Classes/Controller/Action/Ajax/AbstractCoreUpdate.php b/typo3/sysext/install/Classes/Controller/Action/Ajax/AbstractCoreUpdate.php
index 60d456e65ee3ca6ef7a1455acfd83736d1e3ebda..84886ceb70c49e45f15bf2b3aaa86b0c76caf78f 100644
--- a/typo3/sysext/install/Classes/Controller/Action/Ajax/AbstractCoreUpdate.php
+++ b/typo3/sysext/install/Classes/Controller/Action/Ajax/AbstractCoreUpdate.php
@@ -55,12 +55,12 @@ abstract class AbstractCoreUpdate extends AbstractAjaxAction {
 	protected $coreVersionService;
 
 	/**
-	 * Common stuff to be done before performing update tasks
+	 * Initialize the handle action, sets up fluid stuff and assigns default variables.
 	 *
 	 * @return void
 	 * @throws \TYPO3\CMS\Install\Controller\Exception
 	 */
-	protected function initializeCoreUpdate() {
+	protected function initializeHandle() {
 		if (!$this->coreUpdateService->isCoreUpdateEnabled()) {
 			throw new \TYPO3\CMS\Install\Controller\Exception(
 				'Core Update disabled in this environment',
diff --git a/typo3/sysext/install/Classes/Controller/Action/Ajax/CoreUpdateIsUpdateAvailable.php b/typo3/sysext/install/Classes/Controller/Action/Ajax/CoreUpdateIsUpdateAvailable.php
index 95dbf37178b20e2392292723a1e4a8eeb0460df9..f3aa721c6eed336b8db99ff959733e6fc7ff6bd8 100644
--- a/typo3/sysext/install/Classes/Controller/Action/Ajax/CoreUpdateIsUpdateAvailable.php
+++ b/typo3/sysext/install/Classes/Controller/Action/Ajax/CoreUpdateIsUpdateAvailable.php
@@ -35,8 +35,6 @@ class CoreUpdateIsUpdateAvailable extends AbstractCoreUpdate {
 	 * @return array Rendered content
 	 */
 	protected function executeAction() {
-		$this->initializeCoreUpdate();
-
 		$status = array();
 		if ($this->coreVersionService->isInstalledVersionAReleasedVersion()) {
 			$isDevelopmentUpdateAvailable = $this->coreVersionService->isYoungerPatchDevelopmentReleaseAvailable();