diff --git a/chain/actors/actor_init.go b/chain/actors/actor_init.go
index 2424ecd7a..4e5c1fe57 100644
--- a/chain/actors/actor_init.go
+++ b/chain/actors/actor_init.go
@@ -43,14 +43,6 @@ type ExecParams struct {
 	Params []byte
 }
 
-func (ep *ExecParams) UnmarshalCBOR(b []byte) (int, error) {
-	if err := cbor.DecodeInto(b, ep); err != nil {
-		return 0, err
-	}
-
-	return len(b), nil
-}
-
 func CreateExecParams(act cid.Cid, obj interface{}) ([]byte, error) {
 	encparams, err := cbor.DumpObject(obj)
 	if err != nil {
diff --git a/chain/actors/actor_storagemarket.go b/chain/actors/actor_storagemarket.go
index 772d8d9f9..2ae622a09 100644
--- a/chain/actors/actor_storagemarket.go
+++ b/chain/actors/actor_storagemarket.go
@@ -34,14 +34,6 @@ type CreateStorageMinerParams struct {
 	PeerID     peer.ID
 }
 
-func (p *CreateStorageMinerParams) UnmarshalCBOR(b []byte) (int, error) {
-	if err := cbor.DecodeInto(b, p); err != nil {
-		return 0, err
-	}
-
-	return len(b), nil
-}
-
 func (sma StorageMarketActor) CreateStorageMiner(act *types.Actor, vmctx types.VMContext, params *CreateStorageMinerParams) (types.InvokeRet, error) {
 	if !SupportedSectorSize(params.SectorSize) {
 		//Fatal("Unsupported sector size")