diff --git a/libraries/src/Updater/Updater.php b/libraries/src/Updater/Updater.php
index 464153cc7ee3b..77031c826053f 100644
--- a/libraries/src/Updater/Updater.php
+++ b/libraries/src/Updater/Updater.php
@@ -320,7 +320,7 @@ private function getUpdateObjectsForSite($updateSite, $minimumStability = self::
 							array(
 								'element'   => $current_update->get('element'),
 								'type'      => $current_update->get('type'),
-								'client_id' => $current_update->get('client_id'),
+								'client_id' => (int) $current_update->get('client_id'),
 								'folder'    => $current_update->get('folder'),
 							)
 						);
@@ -330,7 +330,7 @@ private function getUpdateObjectsForSite($updateSite, $minimumStability = self::
 							array(
 								'element'   => $current_update->get('element'),
 								'type'      => $current_update->get('type'),
-								'client_id' => $current_update->get('client_id'),
+								'client_id' => (int) $current_update->get('client_id'),
 								'folder'    => $current_update->get('folder'),
 							)
 						);