diff --git a/src/plugins/pricelist/components/CalculationTable/DrinkPriceVolumes.vue b/src/plugins/pricelist/components/CalculationTable/DrinkPriceVolumes.vue
index 2ba74c7..9fd8611 100644
--- a/src/plugins/pricelist/components/CalculationTable/DrinkPriceVolumes.vue
+++ b/src/plugins/pricelist/components/CalculationTable/DrinkPriceVolumes.vue
@@ -211,6 +211,7 @@ export default defineComponent({
       const index = volumes.value.findIndex((a) => a.id === _volume.id);
       if (index > -1) {
         volumes.value[index].volume = calc_volume(_volume);
+        volumes.value[index]._volume = <number>volumes.value[index].volume;
       }
       change();
       setTimeout(() => {