diff --git a/cmd/lotus-miner/init.go b/cmd/lotus-miner/init.go
index 1aa6bb59b0c..5f0e91a09b4 100644
--- a/cmd/lotus-miner/init.go
+++ b/cmd/lotus-miner/init.go
@@ -547,7 +547,7 @@ func storageMinerInit(ctx context.Context, cctx *cli.Context, api v1api.FullNode
 
 		addr = a
 	} else {
-		a, err := createStorageMiner(ctx, api, peerid, gasPrice, cctx)
+		a, err := createStorageMiner(ctx, api, ssize, peerid, gasPrice, cctx)
 		if err != nil {
 			return xerrors.Errorf("creating miner failed: %w", err)
 		}
@@ -627,7 +627,7 @@ func configureStorageMiner(ctx context.Context, api v1api.FullNode, addr address
 	return nil
 }
 
-func createStorageMiner(ctx context.Context, api v1api.FullNode, peerid peer.ID, gasPrice types.BigInt, cctx *cli.Context) (address.Address, error) {
+func createStorageMiner(ctx context.Context, api v1api.FullNode, ssize abi.SectorSize, peerid peer.ID, gasPrice types.BigInt, cctx *cli.Context) (address.Address, error) {
 	var err error
 	var owner address.Address
 	if cctx.String("owner") != "" {
@@ -639,11 +639,6 @@ func createStorageMiner(ctx context.Context, api v1api.FullNode, peerid peer.ID,
 		return address.Undef, err
 	}
 
-	ssize, err := units.RAMInBytes(cctx.String("sector-size"))
-	if err != nil {
-		return address.Undef, fmt.Errorf("failed to parse sector size: %w", err)
-	}
-
 	worker := owner
 	if cctx.String("worker") != "" {
 		worker, err = address.NewFromString(cctx.String("worker"))
diff --git a/documentation/en/cli-lotus-miner.md b/documentation/en/cli-lotus-miner.md
index 0e43e2e49fb..a10cb45baa3 100644
--- a/documentation/en/cli-lotus-miner.md
+++ b/documentation/en/cli-lotus-miner.md
@@ -71,7 +71,7 @@ OPTIONS:
    --create-worker-key          create separate worker key (default: false)
    --worker value, -w value     worker key to use (overrides --create-worker-key)
    --owner value, -o value      owner key to use
-   --sector-size value          specify sector size to use (default: "2KiB")
+   --sector-size value          specify sector size to use
    --pre-sealed-sectors value   specify set of presealed sectors for starting as a genesis miner  (accepts multiple inputs)
    --pre-sealed-metadata value  specify the metadata file for the presealed sectors
    --nosync                     don't check full-node sync status (default: false)