diff --git a/api/api_full.go b/api/api_full.go
index 55e958850..fe61afa26 100644
--- a/api/api_full.go
+++ b/api/api_full.go
@@ -609,14 +609,15 @@ type MethodCall struct {
 }
 
 type StartDealParams struct {
-	Data              *storagemarket.DataRef
-	Wallet            address.Address
-	Miner             address.Address
-	EpochPrice        types.BigInt
-	MinBlocksDuration uint64
-	DealStartEpoch    abi.ChainEpoch
-	FastRetrieval     bool
-	VerifiedDeal      bool
+	Data               *storagemarket.DataRef
+	Wallet             address.Address
+	Miner              address.Address
+	EpochPrice         types.BigInt
+	MinBlocksDuration  uint64
+	ProviderCollateral big.Int
+	DealStartEpoch     abi.ChainEpoch
+	FastRetrieval      bool
+	VerifiedDeal       bool
 }
 
 type IpldObject struct {
diff --git a/cli/client.go b/cli/client.go
index 0e70a6faa..968146cc4 100644
--- a/cli/client.go
+++ b/cli/client.go
@@ -311,6 +311,10 @@ var clientDealCmd = &cli.Command{
 			Usage: "indicate that the deal counts towards verified client total",
 			Value: false,
 		},
+		&cli.StringFlag{
+			Name:  "provider-collateral",
+			Usage: "specify the requested provider collateral the miner should put up",
+		},
 		&CidBaseFlag,
 	},
 	Action: func(cctx *cli.Context) error {
@@ -351,6 +355,15 @@ var clientDealCmd = &cli.Command{
 			return err
 		}
 
+		var provCol big.Int
+		if pcs := cctx.String("provider-collateral"); pc != "" {
+			pc, err := big.FromString(pc)
+			if err != nil {
+				return fmt.Errorf("failed to parse provider-collateral: %w", err)
+			}
+			provCol = pc
+		}
+
 		if abi.ChainEpoch(dur) < build.MinDealDuration {
 			return xerrors.Errorf("minimum deal duration is %d blocks", build.MinDealDuration)
 		}
@@ -415,14 +428,15 @@ var clientDealCmd = &cli.Command{
 		}
 
 		proposal, err := api.ClientStartDeal(ctx, &lapi.StartDealParams{
-			Data:              ref,
-			Wallet:            a,
-			Miner:             miner,
-			EpochPrice:        types.BigInt(price),
-			MinBlocksDuration: uint64(dur),
-			DealStartEpoch:    abi.ChainEpoch(cctx.Int64("start-epoch")),
-			FastRetrieval:     cctx.Bool("fast-retrieval"),
-			VerifiedDeal:      isVerified,
+			Data:               ref,
+			Wallet:             a,
+			Miner:              miner,
+			EpochPrice:         types.BigInt(price),
+			MinBlocksDuration:  uint64(dur),
+			DealStartEpoch:     abi.ChainEpoch(cctx.Int64("start-epoch")),
+			FastRetrieval:      cctx.Bool("fast-retrieval"),
+			VerifiedDeal:       isVerified,
+			ProviderCollateral: provCol,
 		})
 		if err != nil {
 			return err
diff --git a/node/impl/client/client.go b/node/impl/client/client.go
index 404487859..df9febe75 100644
--- a/node/impl/client/client.go
+++ b/node/impl/client/client.go
@@ -36,7 +36,6 @@ import (
 	"github.com/filecoin-project/go-multistore"
 	"github.com/filecoin-project/go-padreader"
 	"github.com/filecoin-project/specs-actors/actors/abi"
-	"github.com/filecoin-project/specs-actors/actors/abi/big"
 	"github.com/filecoin-project/specs-actors/actors/builtin/miner"
 
 	marketevents "github.com/filecoin-project/lotus/markets/loggers"
@@ -157,7 +156,7 @@ func (a *API) ClientStartDeal(ctx context.Context, params *api.StartDealParams)
 		StartEpoch:    dealStart,
 		EndEpoch:      calcDealExpiration(params.MinBlocksDuration, md, dealStart),
 		Price:         params.EpochPrice,
-		Collateral:    big.Zero(),
+		Collateral:    params.ProviderCollateral,
 		Rt:            rt,
 		FastRetrieval: params.FastRetrieval,
 		VerifiedDeal:  params.VerifiedDeal,