diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a557cc01..0c11aee3b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
 - Fix a bug: unable to create the first user because role member was missing
 - Fix a bug: disabled groups still appears as available in sign-up modal
 - Fix a bug: extend a current subscription for a member, does not reset his credits
+- Fix a bug: once a reservation was made, the reminder of the paid price is always 0 if a coupon was used
 - Fix a security issue: updated nokogiri to 1.10.4 to fix [CVE-2019-5477](https://nvd.nist.gov/vuln/detail/CVE-2019-5477)
 - Fix a security issue: updated eslint-utils to 1.4.2 to fix [GHSA-3gx7-xhv7-5mx3](https://github.com/mysticatea/eslint-utils/security/advisories/GHSA-3gx7-xhv7-5mx3)
 - Fix a security issue: updated devise to 4.7.1 to fix [CVE-2019-16109](https://nvd.nist.gov/vuln/detail/CVE-2019-16109)
diff --git a/app/assets/javascripts/directives/cart.js.erb b/app/assets/javascripts/directives/cart.js.erb
index 547e5268c..75dcce2f0 100644
--- a/app/assets/javascripts/directives/cart.js.erb
+++ b/app/assets/javascripts/directives/cart.js.erb
@@ -48,6 +48,9 @@ Application.Directives.directive('cart', [ '$rootScope', '$uibModal', 'dialogs',
         // total amount of the elements in the cart, without considering any coupon
         $scope.totalNoCoupon = 0;
 
+        // once the cart was paid, retain the total amount paid by the customer
+        $scope.amountPaid = 0;
+
         // Discount coupon to apply to the basket, if any
         $scope.coupon = { applied: null };
 
@@ -240,8 +243,8 @@ Application.Directives.directive('cart', [ '$rootScope', '$uibModal', 'dialogs',
             }
           });
           // watch when a coupon is applied to re-compute the total price
-          return $scope.$watch('coupon.applied', function (newValue, oldValue) {
-            if ((newValue !== null) || (oldValue !== null)) {
+          $scope.$watch('coupon.applied', function (newValue, oldValue) {
+            if (newValue !== oldValue) {
               return updateCartPrice();
             }
           });
@@ -588,6 +591,7 @@ Application.Directives.directive('cart', [ '$rootScope', '$uibModal', 'dialogs',
         var afterPayment = function (reservation) {
           // we set the cart content as 'paid' to display a summary of the transaction
           $scope.events.paid = $scope.events.reserved;
+          $scope.amountPaid = $scope.amountTotal;
           // we call the external callback if present
           if (typeof $scope.afterPayment === 'function') { $scope.afterPayment(reservation); }
           // we reset the coupon and the cart content and we unselect the slot
diff --git a/app/assets/templates/shared/_cart.html.erb b/app/assets/templates/shared/_cart.html.erb
index 76e4918ec..4a7179243 100644
--- a/app/assets/templates/shared/_cart.html.erb
+++ b/app/assets/templates/shared/_cart.html.erb
@@ -78,7 +78,7 @@
       </div>
     </div>
 
-    <div class="m-t-md font-sbold">{{ 'cart.total_' | translate }} {{amountTotal | currency}}</div>
+    <div class="m-t-md font-sbold">{{ 'cart.total_' | translate }} {{amountPaid | currency}}</div>
 
     <div class="alert alert-success" ng-if="user.subscribed_plan">{{ 'cart.thank_you_your_payment_has_been_successfully_registered' | translate }}<br>
       {{ 'cart.your_invoice_will_be_available_soon_from_your_' | translate }} <a ui-sref="app.logged.dashboard.invoices" translate>{{ 'cart.dashboard' }}</a>
@@ -164,4 +164,4 @@
     </div>
   </div>
 
-</div>
\ No newline at end of file
+</div>