diff --git a/frontend/www/scripts/diet.js b/frontend/www/scripts/diet.js
index 007316e7998e013c7ad79bae4ff7ccb0e2ca8463..6090f38263306248b715a0ea3d346b78a95e910e 100644
--- a/frontend/www/scripts/diet.js
+++ b/frontend/www/scripts/diet.js
@@ -152,7 +152,7 @@ async function retrieveDiet(id) {
         // adding mealtype instances
         let mealtypeInstances = [];
         let mealtypeInstancesTypes = formData.getAll("type");
-        for (value of mealtypeInstancesTypes) {
+        for (let value of mealtypeInstancesTypes) {
             mealtypeInstances.push({
                 mealtype: `${HOST}/api/mealtypes/${value}/`,
             });