diff --git a/core/rpc/client/chain/interface.go b/core/rpc/client/chain/interface.go
index b144331a5..d3bdba84b 100644
--- a/core/rpc/client/chain/interface.go
+++ b/core/rpc/client/chain/interface.go
@@ -17,5 +17,5 @@ type Client interface {
 	Genesis(ctx context.Context) (*chaintypes.Genesis, error)
 	ConsensusParams(ctx context.Context) (*types.ConsensusParams, error)
 	Validators(ctx context.Context) (height int64, validators []*types.Validator, err error)
-	UnconfirmedTxs(ctx context.Context) (total int64, tx chaintypes.NamedTx, err error)
+	UnconfirmedTxs(ctx context.Context) (total int, txs []chaintypes.NamedTx, err error)
 }