diff --git a/class/actions_gmao.class.php b/class/actions_gmao.class.php
index fd867d2..6e6ce17 100644
--- a/class/actions_gmao.class.php
+++ b/class/actions_gmao.class.php
@@ -86,6 +86,26 @@ public function addHtmlHeader(array $parameters): int
         return 0; // or return 1 to replace standard code
     }
 
+    /**
+     * Overloading the formObjectOptions function : replacing the parent's function with the one below
+     *
+     * @param  array     $parameters Hook metadatas (context, etc...)
+     * @return int                   0 < on error, 0 on success, 1 to replace standard code
+     * @throws Exception
+     */
+    public function formObjectOptions(array $parameters, $object, $action): int
+    {
+        global $extrafields, $langs;
+
+        if (strpos($parameters['context'], 'productlotcard') !== false) {
+            $pictoPath = dol_buildpath('/gmao/img/gmao_color.png', 1);
+            $picto     = img_picto('', $pictoPath, '', 1, 0, 0, '', 'pictoModule marginrightonly');
+
+            $extrafields->attributes['product_lot']['label']['warehouse'] = $picto . $langs->transnoentities('Warehouse');
+        }
+        return 0;
+    }
+
     /**
      * Overloading the doActions function : replacing the parent's function with the one below
      *
@@ -315,6 +335,27 @@ public function addMoreActionsButtons(array $parameters, &$object, &$action): in
         return 0; // or return 1 to replace standard code
     }
 
+    /**
+     * Overloading the printFieldListOption function : replacing the parent's function with the one below
+     *
+     * @param  array     $parameters Hook metadatas (context, etc...)
+     * @return int                   0 < on error, 0 on success, 1 to replace standard code
+     * @throws Exception
+     */
+    public function printFieldListOption(array $parameters): int
+    {
+        global $extrafields, $langs;
+
+        if (strpos($parameters['context'], 'product_lotlist') !== false) {
+            $pictoPath = dol_buildpath('/gmao/img/gmao_color.png', 1);
+            $picto     = img_picto('', $pictoPath, '', 1, 0, 0, '', 'pictoModule');
+
+            $extrafields->attributes['product_lot']['label']['warehouse'] = $picto . $langs->transnoentities('Warehouse');
+        }
+
+        return 0;
+    }
+
     /**
      * Overloading the printCommonFooter function : replacing the parent's function with the one below
      *
@@ -326,6 +367,7 @@ public function printCommonFooter(array $parameters): int
     {
         global $conf, $langs, $object;
 
+
         if (strpos($parameters['context'], 'ticketcard') !== false) {
             if (getDolGlobalInt('TICKET_ENABLE_PUBLIC_INTERFACE')) {
                 require_once __DIR__ . '/../../saturne/lib/medias.lib.php';
diff --git a/core/modules/modGMAO.class.php b/core/modules/modGMAO.class.php
index 5592467..516b791 100644
--- a/core/modules/modGMAO.class.php
+++ b/core/modules/modGMAO.class.php
@@ -67,7 +67,6 @@ public function __construct($db)
         $this->familyinfo = ['Evarisk' => ['position' => '01', 'label' => 'Evarisk']];
         // Module label (no space allowed), used if translation string 'ModuleGMAOName' not found (GMAO is name of module)
         $this->name = preg_replace('/^mod/i', '', get_class($this));
-
         // Module description, used if translation string 'ModuleGMAODesc' not found (GMAO is name of module)
         $this->description = $langs->trans('GMAODescription');
         // Used only if file README.md and README-LL.md not found
@@ -120,7 +119,9 @@ public function __construct($db)
             'hooks' => [
                 'ticketcard',
                 'gmaoadmindocuments',
-                'inventorycard'
+                'inventorycard',
+                'product_lotlist',
+                'productlotcard'
             ],
             // Set this to 1 if features of module are opened to external users
             'moduleforexternal' => 0
@@ -268,7 +269,7 @@ public function __construct($db)
      */
     public function init($options = ''): int
     {
-        global $conf, $db, $langs;
+        global $conf, $db, $langs, $user;
 
         // Permissions
         $this->remove($options);
@@ -284,6 +285,14 @@ public function init($options = ''): int
 
         addDocumentModel('gmaoticketdocument_odt', 'gmaoticketdocument', 'ODT templates', 'GMAO_GMAOTICKETDOCUMENT_ADDON_ODT_PATH');
 
+        // Create extrafields during init
+        include_once DOL_DOCUMENT_ROOT . '/core/class/extrafields.class.php';
+
+        $extra_fields = new ExtraFields($this->db);
+
+        $extra_fields->update('warehouse', 'WareHouse', 'link', '', 'product_lot', 0, 0, $this->numero . 10, ['options' => ['Entrepot:product/stock/class/entrepot.class.php' => NULL]], 1, $user->hasRight('stock', 'lire'), 1, '', '', '', 0, 'stocks', "isModEnabled('gmao') && isModEnabled('stock') && isModEnabled('productbatch')", 0, 0, ['csslist' => 'minwidth100 maxwidth300']);
+        $extra_fields->addExtraField('warehouse', 'WareHouse', 'link', $this->numero . 10, '', 'product_lot     ', 0, 0, '', ['options' => ['Entrepot:product/stock/class/entrepot.class.php' => NULL]], 1, $user->hasRight('stock', 'lire'), 1, '', '', 0, 'stocks', "isModEnabled('gmao')  && isModEnabled('stock') && isModEnabled('productbatch')", 0, 0, ['csslist' => 'minwidth100 maxwidth300']);
+        
         return $this->_init($sql, $options);
     }