diff --git a/modules/blockcart/ajax-cart.js b/modules/blockcart/ajax-cart.js
index c71f5e95d..7737c3f39 100644
--- a/modules/blockcart/ajax-cart.js
+++ b/modules/blockcart/ajax-cart.js
@@ -24,6 +24,9 @@
 *  International Registered Trademark & Property of PrestaShop SA
 */
 
+// Retrocompatibility with 1.4
+if (typeof baseUri === "undefined")
+	baseUri = baseDir;
 
 //JS Object : update the cart by ajax actions
 var ajaxCart = {