diff --git a/api/api_storage.go b/api/api_storage.go
index d5203265088..c391149290b 100644
--- a/api/api_storage.go
+++ b/api/api_storage.go
@@ -166,6 +166,8 @@ type StorageMiner interface {
 	MarketPendingDeals(ctx context.Context) (PendingDealInfo, error)                                                             //perm:write
 	MarketPublishPendingDeals(ctx context.Context) error                                                                         //perm:admin
 
+	// RuntimeSubsystems returns the subsystems that are enabled
+	// in this instance.
 	RuntimeSubsystems(ctx context.Context) (MinerSubsystems, error) //perm:read
 
 	DealsImportData(ctx context.Context, dealPropCid cid.Cid, file string) error //perm:admin
diff --git a/api/api_subsystems.go b/api/api_subsystems.go
deleted file mode 100644
index 1894bbdd8a6..00000000000
--- a/api/api_subsystems.go
+++ /dev/null
@@ -1,63 +0,0 @@
-package api
-
-import (
-	"bytes"
-	"encoding/json"
-)
-
-type MinerSubsystems []MinerSubsystem
-
-func (ms MinerSubsystems) Has(entry MinerSubsystem) bool {
-	for _, v := range ms {
-		if v == entry {
-			return true
-		}
-
-	}
-	return false
-}
-
-type MinerSubsystem int
-
-const (
-	MarketsSubsystem MinerSubsystem = iota
-	MiningSubsystem
-	SealingSubsystem
-	SectorStorageSubsystem
-)
-
-func (ms MinerSubsystem) String() string {
-	return MinerSubsystemToString[ms]
-}
-
-var MinerSubsystemToString = map[MinerSubsystem]string{
-	MarketsSubsystem:       "Markets",
-	MiningSubsystem:        "Mining",
-	SealingSubsystem:       "Sealing",
-	SectorStorageSubsystem: "SectorStorage",
-}
-
-var MinerSubsystemToID = map[string]MinerSubsystem{
-	"Markets":       MarketsSubsystem,
-	"Mining":        MiningSubsystem,
-	"Sealing":       SealingSubsystem,
-	"SectorStorage": SectorStorageSubsystem,
-}
-
-func (ms MinerSubsystem) MarshalJSON() ([]byte, error) {
-	buffer := bytes.NewBufferString(`"`)
-	buffer.WriteString(MinerSubsystemToString[ms])
-	buffer.WriteString(`"`)
-	return buffer.Bytes(), nil
-}
-
-func (ms *MinerSubsystem) UnmarshalJSON(b []byte) error {
-	var j string
-	err := json.Unmarshal(b, &j)
-	if err != nil {
-		return err
-	}
-	// TODO: handle zero value
-	*ms = MinerSubsystemToID[j]
-	return nil
-}
diff --git a/api/docgen/docgen.go b/api/docgen/docgen.go
index 1e712a0aeab..f9addc940dd 100644
--- a/api/docgen/docgen.go
+++ b/api/docgen/docgen.go
@@ -16,10 +16,10 @@ import (
 	"github.com/google/uuid"
 	"github.com/ipfs/go-cid"
 	"github.com/ipfs/go-filestore"
-	metrics "github.com/libp2p/go-libp2p-core/metrics"
+	"github.com/libp2p/go-libp2p-core/metrics"
 	"github.com/libp2p/go-libp2p-core/network"
 	"github.com/libp2p/go-libp2p-core/peer"
-	protocol "github.com/libp2p/go-libp2p-core/protocol"
+	"github.com/libp2p/go-libp2p-core/protocol"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	"github.com/multiformats/go-multiaddr"
 
@@ -265,6 +265,12 @@ func init() {
 
 	addExample(api.CheckStatusCode(0))
 	addExample(map[string]interface{}{"abc": 123})
+	addExample(api.MinerSubsystems{
+		api.SubsystemMining,
+		api.SubsystemSealing,
+		api.SubsystemSectorStorage,
+		api.SubsystemMarkets,
+	})
 }
 
 func GetAPIType(name, pkg string) (i interface{}, t reflect.Type, permStruct []reflect.Type) {
diff --git a/api/miner_subsystems.go b/api/miner_subsystems.go
new file mode 100644
index 00000000000..a77de7e3c95
--- /dev/null
+++ b/api/miner_subsystems.go
@@ -0,0 +1,79 @@
+package api
+
+import (
+	"encoding/json"
+)
+
+// MinerSubsystem represents a miner subsystem. Int and string values are not
+// guaranteed to be stable over time  is not
+// guaranteed to be stable over time.
+type MinerSubsystem int
+
+const (
+	// SubsystemUnknown is a placeholder for the zero value. It should never
+	// be used.
+	SubsystemUnknown MinerSubsystem = iota
+	// SubsystemMarkets signifies the storage and retrieval
+	// deal-making subsystem.
+	SubsystemMarkets
+	// SubsystemMining signifies the mining subsystem.
+	SubsystemMining
+	// SubsystemSealing signifies the sealing subsystem.
+	SubsystemSealing
+	// SubsystemSectorStorage signifies the sector storage subsystem.
+	SubsystemSectorStorage
+)
+
+var MinerSubsystemToString = map[MinerSubsystem]string{
+	SubsystemUnknown:       "Unknown",
+	SubsystemMarkets:       "Markets",
+	SubsystemMining:        "Mining",
+	SubsystemSealing:       "Sealing",
+	SubsystemSectorStorage: "SectorStorage",
+}
+
+var MinerSubsystemToID = map[string]MinerSubsystem{
+	"Unknown":       SubsystemUnknown,
+	"Markets":       SubsystemMarkets,
+	"Mining":        SubsystemMining,
+	"Sealing":       SubsystemSealing,
+	"SectorStorage": SubsystemSectorStorage,
+}
+
+func (ms MinerSubsystem) MarshalJSON() ([]byte, error) {
+	return json.Marshal(MinerSubsystemToString[ms])
+}
+
+func (ms *MinerSubsystem) UnmarshalJSON(b []byte) error {
+	var j string
+	err := json.Unmarshal(b, &j)
+	if err != nil {
+		return err
+	}
+	s, ok := MinerSubsystemToID[j]
+	if !ok {
+		*ms = SubsystemUnknown
+	} else {
+		*ms = s
+	}
+	return nil
+}
+
+type MinerSubsystems []MinerSubsystem
+
+func (ms MinerSubsystems) Has(entry MinerSubsystem) bool {
+	for _, v := range ms {
+		if v == entry {
+			return true
+		}
+	}
+	return false
+}
+
+func (ms MinerSubsystem) String() string {
+	s, ok := MinerSubsystemToString[ms]
+	if !ok {
+		return MinerSubsystemToString[SubsystemUnknown]
+	}
+	return s
+}
diff --git a/build/openrpc/miner.json.gz b/build/openrpc/miner.json.gz
index 69d471dbd56..57a56d94fff 100644
Binary files a/build/openrpc/miner.json.gz and b/build/openrpc/miner.json.gz differ
diff --git a/cmd/lotus-miner/info.go b/cmd/lotus-miner/info.go
index 92f25667cc1..878361dacb6 100644
--- a/cmd/lotus-miner/info.go
+++ b/cmd/lotus-miner/info.go
@@ -103,14 +103,14 @@ func infoCmdAct(cctx *cli.Context) error {
 
 	fmt.Println()
 
-	if subsystems.Has(api.SectorStorageSubsystem) {
+	if subsystems.Has(api.SubsystemSectorStorage) {
 		err := handleMiningInfo(ctx, cctx, fullapi, nodeApi)
 		if err != nil {
 			return err
 		}
 	}
 
-	if subsystems.Has(api.MarketsSubsystem) {
+	if subsystems.Has(api.SubsystemMarkets) {
 		err := handleMarketsInfo(ctx, nodeApi)
 		if err != nil {
 			return err
diff --git a/documentation/en/api-v0-methods-miner.md b/documentation/en/api-v0-methods-miner.md
index dcd3abd4df6..3b6d5ac5181 100644
--- a/documentation/en/api-v0-methods-miner.md
+++ b/documentation/en/api-v0-methods-miner.md
@@ -1528,13 +1528,23 @@ Response: `{}`
 
 
 ### RuntimeSubsystems
+RuntimeSubsystems returns the subsystems that are enabled
+in this instance.
 
 
 Perms: read
 
 Inputs: `null`
 
-Response: `null`
+Response:
+```json
+[
+  "Mining",
+  "Sealing",
+  "SectorStorage",
+  "Markets"
+]
+```
 
 ## Sealing
 
diff --git a/node/builder_miner.go b/node/builder_miner.go
index 830e6d075b2..acb9d3d43cd 100644
--- a/node/builder_miner.go
+++ b/node/builder_miner.go
@@ -72,7 +72,7 @@ func ConfigStorageMiner(c interface{}) Option {
 	return Options(
 		ConfigCommon(&cfg.Common, enableLibp2pNode),
 
-		Override(new(api.MinerSubsystems), modules.AddMinerSubsystems(cfg.Subsystems)),
+		Override(new(api.MinerSubsystems), modules.PopulateEnabledMinerSubsystems(cfg.Subsystems)),
 		Override(new(stores.LocalStorage), From(new(repo.LockedRepo))),
 		Override(new(*stores.Local), modules.LocalStorage),
 		Override(new(*stores.Remote), modules.RemoteStorage),
diff --git a/node/impl/storminer.go b/node/impl/storminer.go
index 86c84fee7ea..0fbd1211143 100644
--- a/node/impl/storminer.go
+++ b/node/impl/storminer.go
@@ -23,8 +23,8 @@ import (
 	"github.com/filecoin-project/go-address"
 	datatransfer "github.com/filecoin-project/go-data-transfer"
 	"github.com/filecoin-project/go-fil-markets/piecestore"
-	retrievalmarket "github.com/filecoin-project/go-fil-markets/retrievalmarket"
-	storagemarket "github.com/filecoin-project/go-fil-markets/storagemarket"
+	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
+	"github.com/filecoin-project/go-fil-markets/storagemarket"
 	"github.com/filecoin-project/go-state-types/abi"
 
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
@@ -48,11 +48,11 @@ import (
 type StorageMinerAPI struct {
 	fx.In
 
-	Subsystems api.MinerSubsystems
-
 	api.Common
 	api.Net
 
+	EnabledSubsystems api.MinerSubsystems
+
 	Full        api.FullNode
 	LocalStore  *stores.Local
 	RemoteStore *stores.Remote
@@ -706,7 +706,7 @@ func (sm *StorageMinerAPI) ComputeProof(ctx context.Context, ssi []builtin.Secto
 }
 
 func (sm *StorageMinerAPI) RuntimeSubsystems(context.Context) (res api.MinerSubsystems, err error) {
-	return sm.Subsystems, nil
+	return sm.EnabledSubsystems, nil
 }
 
 var _ api.StorageMiner = &StorageMinerAPI{}
diff --git a/node/modules/storageminer.go b/node/modules/storageminer.go
index 06ef78ca0af..26792ca197b 100644
--- a/node/modules/storageminer.go
+++ b/node/modules/storageminer.go
@@ -1008,19 +1008,18 @@ func mutateCfg(r repo.LockedRepo, mutator func(*config.StorageMiner)) error {
 	return multierr.Combine(typeErr, setConfigErr)
 }
 
-func AddMinerSubsystems(cfg config.MinerSubsystemConfig) (res api.MinerSubsystems) {
+func PopulateEnabledMinerSubsystems(cfg config.MinerSubsystemConfig) (res api.MinerSubsystems) {
 	if cfg.EnableMining {
-		res = append(res, api.MiningSubsystem)
+		res = append(res, api.SubsystemMining)
 	}
 	if cfg.EnableSealing {
-		res = append(res, api.SealingSubsystem)
+		res = append(res, api.SubsystemSealing)
 	}
 	if cfg.EnableSectorStorage {
-		res = append(res, api.SectorStorageSubsystem)
+		res = append(res, api.SubsystemSectorStorage)
 	}
 	if cfg.EnableMarkets {
-		res = append(res, api.MarketsSubsystem)
+		res = append(res, api.SubsystemMarkets)
 	}
-
 	return
 }