diff --git a/src/layouts/schedule/schedule.vue b/src/layouts/schedule/schedule.vue
index 8abd2ca5b..69b1de0c1 100644
--- a/src/layouts/schedule/schedule.vue
+++ b/src/layouts/schedule/schedule.vue
@@ -357,7 +357,7 @@ export default {
                 this.selectedTimeSlotData?.isPremiumAppointment
             ) {
                 const earlyBirdIndex = supportingItems.findIndex(
-                    (item) => item.partNumber == PREMIUM_FEE_PART_TYPE
+                    (item) => item.partType == PREMIUM_FEE_PART_TYPE
                 );
 
                 if (earlyBirdIndex >= 0) {
@@ -379,7 +379,7 @@ export default {
             } else {
                 // if it's not a mobile and/or premium early bird, then make sure we remove any that may have been added
                 const removeEarlyBirdIndex = supportingItems.findIndex(
-                    (item) => item.partNumber == PREMIUM_FEE_PART_TYPE
+                    (item) => item.partType == PREMIUM_FEE_PART_TYPE
                 );
 
                 if (removeEarlyBirdIndex >= 0) {