diff --git a/htdocs/core/class/hookmanager.class.php b/htdocs/core/class/hookmanager.class.php
index 8cef23ff28207..fc8fc9ada5489 100644
--- a/htdocs/core/class/hookmanager.class.php
+++ b/htdocs/core/class/hookmanager.class.php
@@ -318,7 +318,7 @@ public function executeHooks($method, $parameters = array(), &$object = null, &$
 					// Hooks that must return int (hooks with type 'addreplace')
 					if ($hooktype == 'addreplace') {
 						// @phan-suppress-next-line PhanUndeclaredMethod  The method's existence is tested above.
-						$resactiontmp = $actionclassinstance->$method($parameters, $object, $action, $this); // $object and $action can be changed by method ($object->id during creation for example or $action to go back to other action for example)
+						$resactiontmp = (int) $actionclassinstance->$method($parameters, $object, $action, $this); // $object and $action can be changed by method ($object->id during creation for example or $action to go back to other action for example)
 						$resaction += $resactiontmp;
 
 						if ($resactiontmp < 0 || !empty($actionclassinstance->error) || (!empty($actionclassinstance->errors) && count($actionclassinstance->errors) > 0)) {