diff --git a/typo3/sysext/extensionmanager/Classes/Utility/ConfigurationUtility.php b/typo3/sysext/extensionmanager/Classes/Utility/ConfigurationUtility.php
index e44c559dac951f1fa291a4383e093bf5351963c3..c49254323cafdd733ddfe4c00a6712ae1cc3a3a4 100644
--- a/typo3/sysext/extensionmanager/Classes/Utility/ConfigurationUtility.php
+++ b/typo3/sysext/extensionmanager/Classes/Utility/ConfigurationUtility.php
@@ -69,7 +69,8 @@ class ConfigurationUtility implements \TYPO3\CMS\Core\SingletonInterface {
 	 */
 	public function saveDefaultConfiguration($extensionKey) {
 		$currentConfiguration = $this->getCurrentConfiguration($extensionKey);
-		$this->writeConfiguration($currentConfiguration, $extensionKey);
+		$nestedConfiguration = $this->convertValuedToNestedConfiguration($currentConfiguration);
+		$this->writeConfiguration($nestedConfiguration, $extensionKey);
 	}
 
 	/**