diff --git a/chain/types/blockheader.go b/chain/types/blockheader.go
index 8950fd91a..36b43c012 100644
--- a/chain/types/blockheader.go
+++ b/chain/types/blockheader.go
@@ -22,6 +22,16 @@ type Ticket struct {
 	VRFProof []byte
 }
 
+func (t *Ticket) Quality() float64 {
+	ticketHash := blake2b.Sum256(t.VRFProof)
+	ticketNum := BigFromBytes(ticketHash[:]).Int
+	ticketDenu := big.NewInt(1)
+	ticketDenu.Lsh(ticketDenu, 256)
+	tv, _ := new(big.Rat).SetFrac(ticketNum, ticketDenu).Float64()
+	tq := 1 - tv
+	return tq
+}
+
 type BeaconEntry struct {
 	Round uint64
 	Data  []byte
diff --git a/miner/miner.go b/miner/miner.go
index 077e18638..27d3c040d 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -6,12 +6,10 @@ import (
 	"crypto/rand"
 	"encoding/binary"
 	"fmt"
-	"math/big"
 	"sync"
 	"time"
 
 	"github.com/filecoin-project/lotus/chain/gen/slashfilter"
-	"github.com/minio/blake2b-simd"
 
 	"github.com/filecoin-project/go-address"
 	"github.com/filecoin-project/specs-actors/actors/abi"
@@ -392,14 +390,8 @@ func (m *Miner) mineOne(ctx context.Context, base *MiningBase) (*types.BlockMsg,
 		return nil, xerrors.Errorf("failed to compute winning post proof: %w", err)
 	}
 
-	ticketHash := blake2b.Sum256(ticket.VRFProof)
-	ticketNum := types.BigFromBytes(ticketHash[:]).Int
-	ticketDenu := big.NewInt(1)
-	ticketDenu.Lsh(ticketDenu, 256)
-	tq, _ := new(big.Rat).SetFrac(ticketNum, ticketDenu).Float64()
-	tq = 1 - tq
 	// get pending messages early,
-	msgs, err := m.api.MpoolSelect(context.TODO(), base.TipSet.Key(), tq)
+	msgs, err := m.api.MpoolSelect(context.TODO(), base.TipSet.Key(), ticket.Quality())
 	if err != nil {
 		return nil, xerrors.Errorf("failed to select messages for block: %w", err)
 	}
diff --git a/node/impl/full/mpool.go b/node/impl/full/mpool.go
index b1d9a58cb..cd6adef6d 100644
--- a/node/impl/full/mpool.go
+++ b/node/impl/full/mpool.go
@@ -43,7 +43,6 @@ func (a *MpoolAPI) MpoolSelect(ctx context.Context, tsk types.TipSetKey, ticketQ
 		return nil, xerrors.Errorf("loading tipset %s: %w", tsk, err)
 	}
 
-	// TODO FIXME compute (or pass in) the actual ticket quality!
 	return a.Mpool.SelectMessages(ts, ticketQuality)
 }