diff --git a/include/supplier.inc.php b/include/supplier.inc.php
index 889916866..255a997a8 100644
--- a/include/supplier.inc.php
+++ b/include/supplier.inc.php
@@ -123,6 +123,7 @@ if ( $low_action == "list" )
 
 		$f_cat_button=new IButton('add_cat');
 		$f_cat_button->set_attribute('type_cat',FICHE_TYPE_FOURNISSEUR);
+                $f_cat_button->set_attribute('ipopup','ipop_cat');
 		$f_cat_button->label=_('Ajout d\'une catégorie');
 		$f_cat_button->javascript='add_category(this)';
 		echo $f_cat_button->input();