diff --git a/static/src/app/screens/product_screen/product_screen_patch.xml b/static/src/app/screens/product_screen/product_screen_patch.xml
index dce1ed8..ee157f4 100644
--- a/static/src/app/screens/product_screen/product_screen_patch.xml
+++ b/static/src/app/screens/product_screen/product_screen_patch.xml
@@ -12,4 +12,11 @@
             <attribute name="t-attf-class">{{ currentOrder &amp;&amp; currentOrder.isEmpty() ? 'btn-secondary' : 'btn-primary' }}</attribute>
         </xpath>
     </t>
+
+    <t t-inherit="point_of_sale.ControlButtons" t-inherit-mode="extension" owl="1">
+        <!-- Disable Bill button if there are unsent changes -->
+        <xpath expr="//button[@t-on-click='clickPrintBill']" position="attributes">
+            <attribute name="t-att-disabled">!pos.getOrder()?.getOrderlines()?.length or pos.getOrderChanges().nbrOfChanges</attribute>
+        </xpath>
+    </t>
 </templates>