diff --git a/web/override/classes/Cart.php b/web/override/classes/Cart.php
index c93001ae..99023d15 100644
--- a/web/override/classes/Cart.php
+++ b/web/override/classes/Cart.php
@@ -420,30 +420,28 @@ class Cart extends CartCore
                             $order_total += $shipping_fees + $wrapping_fees;
                         }
                     }//else
-                     $id_defaultgroup = Db::getInstance()->executeS('SELECT id_default_group FROM ' . _DB_PREFIX_ . 'customer WHERE id_customer = ' . (int) Context::getContext()->customer->id);
-                     if(is_array($id_defaultgroup))
-                   {
-                    $id_defaultgroup = $id_defaultgroup[0]['id_default_group'];
-                   }
-                    $sql = 'SELECT price FROM `' . _DB_PREFIX_ . 'installmentpayment_group` WHERE id_group=' . (int) $id_defaultgroup;
-                   $data =  Db::getInstance()->getRow($sql);
-                        if(!empty($data)){
-                         $order_total = $order_total - ($order_total * (100 - $data['price']) / 100);
-                           
-                            }
-                        
-                        else
-                        {
-                            if ((int) Configuration::get('ACOMPTE_TYPE') == 1) {
-                                if ($order_total > (float) Configuration::get('ACOMPTE_PERCENTAGE')) {
-                                    $order_total = (float) Configuration::get('ACOMPTE_PERCENTAGE');
+
+                    if (Module::isEnabled('installmentpayment')) {
+                        $id_defaultgroup = Db::getInstance()->executeS('SELECT id_default_group FROM ' . _DB_PREFIX_ . 'customer WHERE id_customer = ' . (int)Context::getContext()->customer->id);
+                        if (is_array($id_defaultgroup)) {
+                            $id_defaultgroup = $id_defaultgroup[0]['id_default_group'];
+                        }
+                        $sql = 'SELECT price FROM `' . _DB_PREFIX_ . 'installmentpayment_group` WHERE id_group=' . (int)$id_defaultgroup;
+                        $data = Db::getInstance()->getRow($sql);
+                        if (!empty($data) && ($data['price'] != '')) {
+                            $order_total = $order_total - ($order_total * (100 - $data['price']) / 100);
+                        } else {
+                            if ((int)Configuration::get('ACOMPTE_TYPE') == 1) {
+                                if ($order_total > (float)Configuration::get('ACOMPTE_PERCENTAGE')) {
+                                    $order_total = (float)Configuration::get('ACOMPTE_PERCENTAGE');
                                 }
                             } else {
                                 $order_total = $order_total - ($order_total * (100 - Configuration::get('ACOMPTE_PERCENTAGE')) / 100);
                             }
                         }
+                    }
                 }
-                if ($page_name == 'installmentpayment' || (isset(Context::getContext()->cookie->installmentpayment_id_order) && !empty(Context::getContext()->cookie->installmentpayment_id_order))) {
+                 if ($page_name == 'installmentpayment' || (isset(Context::getContext()->cookie->installmentpayment_id_order) && !empty(Context::getContext()->cookie->installmentpayment_id_order))) {
                     if (Tools::getValue('select') != '') {
                         Context::getContext()->cookie->__set('installmentpayment_id_order', (int) Tools::getValue('select'));
                     }