diff --git a/chain/deals/provider_states.go b/chain/deals/provider_states.go
index ea5c6c772..5e5dbc273 100644
--- a/chain/deals/provider_states.go
+++ b/chain/deals/provider_states.go
@@ -12,6 +12,7 @@ import (
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/address"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/lib/padreader"
 	"github.com/filecoin-project/lotus/storage/sectorblocks"
 )
 
@@ -218,8 +219,8 @@ func (p *Provider) staged(ctx context.Context, deal MinerDeal) (func(*MinerDeal)
 	if err != nil {
 		return nil, xerrors.Errorf("getting unixfs file size: %w", err)
 	}
-	if uint64(size) != deal.Proposal.PieceSize {
-		return nil, xerrors.Errorf("deal.Proposal.PieceSize didn't match unixfs file size")
+	if padreader.PaddedSize(uint64(size)) != deal.Proposal.PieceSize {
+		return nil, xerrors.Errorf("deal.Proposal.PieceSize didn't match padded unixfs file size")
 	}
 
 	sectorID, err := p.secb.AddUnixfsPiece(deal.Ref, uf, deal.DealID)
diff --git a/lotuspond/front/src/Client.js b/lotuspond/front/src/Client.js
index 37606223b..70aabfd6f 100644
--- a/lotuspond/front/src/Client.js
+++ b/lotuspond/front/src/Client.js
@@ -21,7 +21,7 @@ class Client extends React.Component {
 
     this.state = {
       miners: ["t0101"],
-      ask: {Price: "500000000"},
+      ask: {Price: "1000000000"}, // 2x min default ask to account for bin packing (could also do the math correctly below, but..)
 
       kbs: 1,
       blocks: 12,
@@ -52,7 +52,7 @@ class Client extends React.Component {
   update = (name) => (e) => this.setState({ [name]: e.target.value });
 
   makeDeal = async () => {
-    let perBlk = this.state.ask.Price * this.state.kbs * 1000 / (1 << 30)
+    let perBlk = this.state.ask.Price * this.state.kbs * 1000 / (1 << 30) * 2
 
     let file = await this.props.pondClient.call('Pond.CreateRandomFile', [this.state.kbs * 1000]) // 1024 won't fit in 1k blocks :(
     let cid = await this.props.client.call('Filecoin.ClientImport', [file])
diff --git a/storage/sectorblocks/blocks.go b/storage/sectorblocks/blocks.go
index d46ef9f1b..1d1289def 100644
--- a/storage/sectorblocks/blocks.go
+++ b/storage/sectorblocks/blocks.go
@@ -20,6 +20,7 @@ import (
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/lib/cborrpc"
+	"github.com/filecoin-project/lotus/lib/padreader"
 	"github.com/filecoin-project/lotus/lib/sectorbuilder"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
 	"github.com/filecoin-project/lotus/storage/sector"
@@ -172,7 +173,9 @@ func (st *SectorBlocks) AddUnixfsPiece(ref cid.Cid, r UnixfsReader, dealID uint6
 		intermediate: st.intermediate,
 	}
 
-	return st.Store.AddPiece(refst.pieceRef, uint64(size), refst, dealID)
+	pr, psize := padreader.New(r, uint64(size))
+
+	return st.Store.AddPiece(refst.pieceRef, psize, pr, dealID)
 }
 
 func (st *SectorBlocks) List() (map[cid.Cid][]api.SealedRef, error) {