diff --git a/client/rpc/src/eth_pubsub.rs b/client/rpc/src/eth_pubsub.rs
index a54f10c167..fa676a0062 100644
--- a/client/rpc/src/eth_pubsub.rs
+++ b/client/rpc/src/eth_pubsub.rs
@@ -29,7 +29,7 @@ use sp_blockchain::{Error as BlockChainError, HeaderBackend, HeaderMetadata};
 use sp_runtime::traits::{BlakeTwo256, Block as BlockT, UniqueSaturatedInto};
 use std::{collections::BTreeMap, iter, marker::PhantomData, sync::Arc};
 
-use ethereum::BlockV2 as EthereumBlock;
+use ethereum::{BlockV2 as EthereumBlock, TransactionV2 as EthereumTransaction};
 use ethereum_types::{H256, U256};
 use fc_rpc_core::{
 	types::{
@@ -53,6 +53,8 @@ use jsonrpc_core::Result as JsonRpcResult;
 
 use sc_network::{ExHashT, NetworkService};
 
+use sp_api::ApiExt;
+
 use crate::{frontier_backend_client, overrides::OverrideHandle};
 
 #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
@@ -348,11 +350,32 @@ where
 						.filter_map(move |txhash| {
 							if let Some(xt) = pool.ready_transaction(&txhash) {
 								let best_block: BlockId<B> = BlockId::Hash(client.info().best_hash);
-								let res = match client
-									.runtime_api()
-									.extrinsic_filter(&best_block, vec![xt.data().clone()])
-								{
-									Ok(txs) => {
+
+								let api = client.runtime_api();
+
+								let api_version =
+									if let Ok(Some(api_version)) = api.api_version::<dyn EthereumRuntimeRPCApi<B>>(&best_block) {
+										api_version
+									} else {
+										return futures::future::ready(None);
+									};
+
+								let xts = vec![xt.data().clone()];
+								
+								let txs: Option<Vec<EthereumTransaction>> = if api_version > 1 {
+									api.extrinsic_filter(&best_block, xts).ok()
+								} else {
+									#[allow(deprecated)]
+									if let Ok(legacy) = api.extrinsic_filter_before_version_2(&best_block, xts) {
+										Some(legacy.into_iter().map(|tx| tx.into()).collect())
+									} else {
+										None
+									}
+
+								};
+
+								let res = match txs {
+									Some(txs) => {
 										if txs.len() == 1 {
 											Some(txs[0].clone())
 										} else {