diff --git a/core/state_processor.go b/core/state_processor.go
index 4dc58b9dea..8e238ce1f0 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -85,7 +85,7 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 // and uses the input parameters for its environment. It returns the receipt
 // for the transaction, gas used and an error if the transaction failed,
 // indicating the block was invalid.
-func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, uint64, error) {
+func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, uint64, error) {
 	msg, err := tx.AsMessage(types.MakeSigner(config, header.Number))
 	if err != nil {
 		return nil, 0, err