diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index a684cff7165..32480e5cf15 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3274,7 +3274,7 @@ class Form
 
         $return= '<select class="flat" id="'.$htmlname.'" name="'.$htmlname.'">';
 
-        $sql = 'SELECT rowid, label from '.MAIN_DB_PREFIX.'c_units';
+        $sql = 'SELECT rowid, label, code from '.MAIN_DB_PREFIX.'c_units';
         $sql.= ' WHERE active > 0';
 
         $resql = $this->db->query($sql);