diff --git a/apps/scandic-web/stores/enter-details/helpers.ts b/apps/scandic-web/stores/enter-details/helpers.ts
index 525147b08..42fd0c769 100644
--- a/apps/scandic-web/stores/enter-details/helpers.ts
+++ b/apps/scandic-web/stores/enter-details/helpers.ts
@@ -33,12 +33,12 @@ export function checkIsSameBooking(
 ) {
   const { rooms: prevRooms, errorCode: prevErrorCode, ...prevBooking } = prev
 
-  const prevRoomsWithoutRateCodes = prevRooms.map(
+  const prevRoomsWithoutRateCodes = prevRooms?.map(
     ({ rateCode, counterRateCode, roomTypeCode, ...room }) => room
   )
   const { rooms: nextRooms, errorCode: nextErrorCode, ...nextBooking } = next
 
-  const nextRoomsWithoutRateCodes = nextRooms.map(
+  const nextRoomsWithoutRateCodes = nextRooms?.map(
     ({ rateCode, counterRateCode, roomTypeCode, ...room }) => room
   )