diff --git a/apis/extension/reservation.go b/apis/extension/reservation.go
index cced21860..b43d4335a 100644
--- a/apis/extension/reservation.go
+++ b/apis/extension/reservation.go
@@ -111,8 +111,12 @@ func IsReservationAllocateOnce(r *schedulingv1alpha1.Reservation) bool {
 }
 
 func GetReservationAffinity(annotations map[string]string) (*ReservationAffinity, error) {
+	s, ok := annotations[AnnotationReservationAffinity]
+	if !ok {
+		return nil, nil
+	}
 	var affinity ReservationAffinity
-	if s := annotations[AnnotationReservationAffinity]; s != "" {
+	if s != "" {
 		if err := json.Unmarshal([]byte(s), &affinity); err != nil {
 			return nil, err
 		}
diff --git a/pkg/util/reservation/reservation.go b/pkg/util/reservation/reservation.go
index cd31c3c83..e48bb5aa2 100644
--- a/pkg/util/reservation/reservation.go
+++ b/pkg/util/reservation/reservation.go
@@ -465,7 +465,7 @@ func GetRequiredReservationAffinity(pod *corev1.Pod) (*RequiredReservationAffini
 	if err != nil {
 		return nil, err
 	}
-	if len(reservationAffinity.ReservationSelector) == 0 && reservationAffinity.RequiredDuringSchedulingIgnoredDuringExecution == nil {
+	if reservationAffinity == nil {
 		return nil, nil
 	}
 	var selector labels.Selector