diff --git a/src/router/index.js b/src/router/index.js
index d23d15c38..04c934769 100644
--- a/src/router/index.js
+++ b/src/router/index.js
@@ -171,12 +171,13 @@ router.beforeEach(async (to, from, next) => {
     }
 
     const toQueryPage = to.query?.fmgPage;
-    const notToPIAReturn = toQueryPage != "payment-pia-return";
+    const notToPIAReturn = toQueryPage != fmgPageValues.PAYMENT_PIA_RETURN;
     const isInIframe = window !== window.top;
 
     // fromPaymentToConfirmation workaround for navigating from an iframe but
     // isInIframe evaluates to false for some reason when navigating from payment to confirmation
-    const fromPaymentToConfirmation = fromQueryPage === "payment" && toQueryPage === "confirmation";
+    const fromPaymentToConfirmation =
+        fromQueryPage === fmgPageValues.PAYMENT && toQueryPage === fmgPageValues.CONFIRMATION;
 
     if ((isInIframe && notToPIAReturn) || fromPaymentToConfirmation) {
         const newUrl = `${window.top.location.origin}${to.href}`;