diff --git a/crates/optimism/rpc/src/error.rs b/crates/optimism/rpc/src/error.rs
index 821caad57f..99f4e4ff4b 100644
--- a/crates/optimism/rpc/src/error.rs
+++ b/crates/optimism/rpc/src/error.rs
@@ -1,5 +1,6 @@
 //! RPC errors specific to OP.
 
+use alloy_json_rpc::ErrorPayload;
 use alloy_rpc_types_eth::{error::EthRpcErrorCode, BlockError};
 use alloy_transport::{RpcError, TransportErrorKind};
 use jsonrpsee_types::error::{INTERNAL_ERROR_CODE, INVALID_PARAMS_CODE};
@@ -140,18 +141,22 @@ pub enum SequencerClientError {
     /// Wrapper around an [`RpcError<TransportErrorKind>`].
     #[error(transparent)]
     HttpError(#[from] RpcError<TransportErrorKind>),
-    /// Thrown when serializing transaction to forward to sequencer
-    #[error("invalid sequencer transaction")]
-    InvalidSequencerTransaction,
 }
 
 impl From<SequencerClientError> for jsonrpsee_types::error::ErrorObject<'static> {
     fn from(err: SequencerClientError) -> Self {
-        jsonrpsee_types::error::ErrorObject::owned(
-            INTERNAL_ERROR_CODE,
-            err.to_string(),
-            None::<String>,
-        )
+        match err {
+            SequencerClientError::HttpError(RpcError::ErrorResp(ErrorPayload {
+                code,
+                message,
+                data,
+            })) => jsonrpsee_types::error::ErrorObject::owned(code as i32, message, data),
+            err => jsonrpsee_types::error::ErrorObject::owned(
+                INTERNAL_ERROR_CODE,
+                err.to_string(),
+                None::<String>,
+            ),
+        }
     }
 }