diff --git a/static/src/app/pos_order_patch.js b/static/src/app/pos_order_patch.js
index 5bfb8cb..7e0e3ac 100644
--- a/static/src/app/pos_order_patch.js
+++ b/static/src/app/pos_order_patch.js
@@ -57,7 +57,7 @@ patch(PosOrder.prototype, {
             }
             for (const program of programs) {
                 // Skip lines for the current program's discounts.
-                if (isDiscount && rewardProgram.id === program.id) {
+                if (isDiscount && rewardProgram?.id === program.id) {
                     continue;
                 }
                 for (const rule of program.rule_ids) {