diff --git a/bindings/go/evmc/host.go b/bindings/go/evmc/host.go
index c7b27ca..a9b4696 100644
--- a/bindings/go/evmc/host.go
+++ b/bindings/go/evmc/host.go
@@ -77,6 +77,7 @@ type TxContext struct {
 	Timestamp  int64
 	GasLimit   int64
 	Difficulty common.Hash
+	ChainID    common.Hash
 }
 
 type HostContext interface {
@@ -181,6 +182,7 @@ func getTxContext(pCtx unsafe.Pointer) C.struct_evmc_tx_context {
 		C.int64_t(txContext.Timestamp),
 		C.int64_t(txContext.GasLimit),
 		evmcBytes32(txContext.Difficulty),
+		evmcBytes32(txContext.ChainID),
 	}
 }