diff --git a/newsfragments/2450.misc.rst b/newsfragments/2450.misc.rst
new file mode 100644
index 0000000000..eaca4dda9e
--- /dev/null
+++ b/newsfragments/2450.misc.rst
@@ -0,0 +1 @@
+Add ``chainId`` to tx params to ``TRANSACTION_PARAMS_ABI``
diff --git a/web3/_utils/rpc_abi.py b/web3/_utils/rpc_abi.py
index 4ebf435919..bb55e89c9a 100644
--- a/web3/_utils/rpc_abi.py
+++ b/web3/_utils/rpc_abi.py
@@ -163,6 +163,7 @@ class RPC:
     'nonce': 'uint',
     'to': 'address',
     'value': 'uint',
+    'chainId': 'uint',
 }
 
 FILTER_PARAMS_ABIS = {
diff --git a/web3/middleware/validation.py b/web3/middleware/validation.py
index 23872858ef..852d921bdc 100644
--- a/web3/middleware/validation.py
+++ b/web3/middleware/validation.py
@@ -55,11 +55,12 @@
 
 @curry
 def _validate_chain_id(web3_chain_id: int, chain_id: int) -> int:
-    if to_integer_if_hex(chain_id) == web3_chain_id:
+    chain_id_int = to_integer_if_hex(chain_id)
+    if chain_id_int == web3_chain_id:
         return chain_id
     else:
         raise ValidationError(
-            f"The transaction declared chain ID {chain_id!r}, "
+            f"The transaction declared chain ID {chain_id_int!r}, "
             f"but the connected node is on {web3_chain_id!r}"
         )