diff --git a/htdocs/product/stock/class/mouvementstock.class.php b/htdocs/product/stock/class/mouvementstock.class.php
index 55d12f26c6c..d64fbe5ef90 100644
--- a/htdocs/product/stock/class/mouvementstock.class.php
+++ b/htdocs/product/stock/class/mouvementstock.class.php
@@ -984,7 +984,7 @@ class MouvementStock extends CommonObject
                     // Separate originetype with "@" : left part is class name, right part is module name
                     $origintype_array = explode('@', $origintype);
                     $classname = ucfirst($origintype_array[0]);
-                    $modulename = empty($origintype_array[1]) ? $classname : empty($origintype_array[1]);
+                    $modulename = empty($origintype_array[1]) ? $classname : $origintype_array[1];
 					$result = dol_include_once('/'.$modulename.'/class/'.strtolower($classname).'.class.php');
 					if ($result)
 					{