diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index bddf5129cb2a4..694acf1806ab1 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -354,7 +354,8 @@ impl fp_rpc::ConvertTransaction<opaque::UncheckedExtrinsic> for TransactionConve
 pub struct EthereumFindAuthor<F>(PhantomData<F>);
 
 parameter_types! {
-	pub BlockGasLimit: u64 = NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT / WEIGHT_PER_GAS;
+	pub BlockGasLimit: U256
+		= U256::from(NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT / WEIGHT_PER_GAS);
 }
 
 impl pallet_ethereum::Config for Runtime {
@@ -680,6 +681,10 @@ impl_runtime_apis! {
 				Ethereum::current_transaction_statuses()
 			)
 		}
+
+		fn current_block_gas_limit() -> U256 {
+			<Runtime as pallet_ethereum::Config>::BlockGasLimit::get()
+		}
 	}
 
 	impl pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi<Block, Balance>