diff --git a/app/ecs/components/inventory.js b/app/ecs/components/inventory.js
index 23d5811..476687f 100644
--- a/app/ecs/components/inventory.js
+++ b/app/ecs/components/inventory.js
@@ -264,7 +264,12 @@ export default class Inventory extends Component {
         for (let slot = 1; slot < 11; ++slot) {
           if (slots[slot]?.source === stack.source) {
             slots[slot].qty += stack.qty;
-            Component.markChange(this.entity, 'qtyUpdated', {[slot]: stack.qty});
+            if (ecs.diff[this.entity]?.Inventory?.given?.[slot]) {
+              ecs.diff[this.entity].Inventory.given[slot].qty += stack.qty;
+            }
+            else {
+              Component.markChange(this.entity, 'qtyUpdated', {[slot]: stack.qty});
+            }
             return;
           }
         }