diff --git a/app/ecs/components/inventory.js b/app/ecs/components/inventory.js
index e7c7c8f..8967768 100644
--- a/app/ecs/components/inventory.js
+++ b/app/ecs/components/inventory.js
@@ -208,18 +208,25 @@ export default class Inventory extends Component {
           }
         }
         const {qty} = slots[slot];
-        slots[slot].qty = 0;
+        slots[slot].qty -= qty;
         for (let i = 0; i < qty; ++i) {
           const [entityId, destination] = destinations[i % destinations.length];
           const {Inventory} = ecs.get(entityId);
           const {slots} = Inventory;
           slots[destination].qty += 1;
         }
-        if (!destinations.find(([entityId, destination]) => {
-          return entityId == this.entity && destination === slot;
-        })) {
+        if (0 === slots[slot].qty) {
           this.clear(slot);
         }
+        else {
+          if (
+            !destinations.find(([entityId, destination]) => {
+              return entityId == this.entity && destination === slot;
+            })
+          ) {
+            Component.markChange(this.entity, 'qtyUpdated', {[slot]: -qty});
+          }
+        }
         for (const [entityId, destination] of given) {
           const {Inventory} = ecs.get(entityId);
           const {slots} = Inventory;