diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index bc831baeddf..4084967a7c6 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3015,6 +3015,8 @@ class Form
         global $langs;
         $langs->load("categories");
 
+		include_once DOL_DOCUMENT_ROOT.'/categories/class.categorie.class.php';
+        
         $cat = new Categorie($this->db);
         $cate_arbo = $cat->get_full_arbo($type,$excludeafterid);
 
@@ -4673,6 +4675,8 @@ class Form
 	{
 		global $db;
 
+		include_once DOL_DOCUMENT_ROOT.'/categories/class.categorie.class.php';
+		
 		$cat = new Categorie($db);
 		$categories = $cat->containing($id, $type);
 
diff --git a/htdocs/fourn/card.php b/htdocs/fourn/card.php
index 5a1f38806bb..55993221d41 100644
--- a/htdocs/fourn/card.php
+++ b/htdocs/fourn/card.php
@@ -264,10 +264,13 @@ if ($object->id > 0)
 	print '</tr>';
 
 	// Categories
-	print '<tr><td>' . $langs->trans("Categories") . '</td>';
-	print '<td colspan="3">';
-	print $form->showCategories($object->id, 'supplier', 1);
-	print "</td></tr>";
+	if (! empty($conf->categorie->enabled))
+	{
+    	print '<tr><td>' . $langs->trans("Categories") . '</td>';
+    	print '<td colspan="3">';
+    	print $form->showCategories($object->id, 'supplier', 1);
+    	print "</td></tr>";
+	}
 
 	// Other attributes
 	$parameters=array('socid'=>$object->id, 'colspan' => ' colspan="3"', 'colspanvalue' => '3');