diff --git a/sealing.go b/sealing.go
index 24d43c1b1..f649e62ab 100644
--- a/sealing.go
+++ b/sealing.go
@@ -35,7 +35,6 @@ type SealingAPI interface {
 	SendMsg(ctx context.Context, from, to address.Address, method abi.MethodNum, value, gasPrice big.Int, gasLimit int64, params []byte) (cid.Cid, error)
 	ChainHead(ctx context.Context) (TipSetToken, abi.ChainEpoch, error)
 	ChainGetRandomness(ctx context.Context, tok TipSetToken, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error)
-	ChainReadObj(context.Context, cid.Cid) ([]byte, error)
 }
 
 type Sealing struct {