diff --git a/handlers/api.go b/handlers/api.go
index de8e9027c7..69f93d5795 100644
--- a/handlers/api.go
+++ b/handlers/api.go
@@ -1060,6 +1060,11 @@ func getExpectedSyncCommitteeSlots(validators []uint64, epoch uint64) (expectedS
 		return 0, nil
 	}
 
+	lastFinalizedEpoch := services.LatestFinalizedEpoch()
+	if epoch > lastFinalizedEpoch {
+		epoch = lastFinalizedEpoch
+	}
+
 	// retrieve activation and exit epochs from database per validator
 	type ValidatorInfo struct {
 		Id                         int64  `db:"validatorindex"`