diff --git a/src/pages/checkout/index.jsx b/src/pages/checkout/index.jsx
index 873b252f1..1319c913a 100644
--- a/src/pages/checkout/index.jsx
+++ b/src/pages/checkout/index.jsx
@@ -161,7 +161,7 @@ function Checkout() {
   };
 
   const handleCoupon = (coupons, actions) => {
-    const alreadyAppliedCoupon = selfAppliedCoupon?.slug === discountCode || selfAppliedCoupon?.slug === couponValue;
+    const alreadyAppliedCoupon = (selfAppliedCoupon?.slug && selfAppliedCoupon?.slug === discountCode) || (selfAppliedCoupon?.slug && selfAppliedCoupon?.slug === couponValue);
 
     if (alreadyAppliedCoupon) {
       toast({