diff --git a/src/js/main.js b/src/js/main.js
index f736df9e876c388a9aad6157603ef6ac42b7f028..f544f74afbe0f26c913f226805c25e6a2f135345 100644
--- a/src/js/main.js
+++ b/src/js/main.js
@@ -32,7 +32,11 @@ export async function addItemTag(form) {
     var response = await fetch("http://127.0.0.1:8000/tag/"+form.value);
     if (response.status == 200) {
       var tracking_item = await response.json();
-      received_items[tracking_item.uuid] = { "num":1, "item": tracking_item };
+      if (tracking_item.uuid in received_items) {
+        received_items[tracking_item.uuid].num += 1;
+      } else {
+        received_items[tracking_item.uuid] = { "num":1, "item": tracking_item };
+      }
       updateItemsView();
       scanner_audio.play();
       form.value = "";