diff --git a/rpc/README.md b/rpc/README.md
index b21cfd9e3d..f44bb2ab39 100644
--- a/rpc/README.md
+++ b/rpc/README.md
@@ -4440,6 +4440,7 @@ The parameters and errors of this method are the same as `send_transaction`.
 ###### Errors
 
 * [`PoolRejectedTransactionByOutputsValidator (-1102)`](../enum.RPCError.html#variant.PoolRejectedTransactionByOutputsValidator) - The transaction is rejected by the validator specified by `outputs_validator`. If you really want to send transactions with advanced scripts, please set `outputs_validator` to "passthrough".
+* [`PoolRejectedTransactionByMinFeeRate (-1104)`](../enum.RPCError.html#variant.PoolRejectedTransactionByMinFeeRate) - The transaction fee rate must be greater than or equal to the config option `tx_pool.min_fee_rate`.
 * [`PoolRejectedTransactionByMaxAncestorsCountLimit (-1105)`](../enum.RPCError.html#variant.PoolRejectedTransactionByMaxAncestorsCountLimit) - The ancestors count must be greater than or equal to the config option `tx_pool.max_ancestors_count`.
 * [`PoolRejectedDuplicatedTransaction (-1107)`](../enum.RPCError.html#variant.PoolRejectedDuplicatedTransaction) - The transaction is already in the pool.
 * [`TransactionFailedToResolve (-301)`](../enum.RPCError.html#variant.TransactionFailedToResolve) - Failed to resolve the referenced cells and headers used in the transaction, as inputs or dependencies.
diff --git a/rpc/src/module/pool.rs b/rpc/src/module/pool.rs
index 1d1f0517b7..ee2305b384 100644
--- a/rpc/src/module/pool.rs
+++ b/rpc/src/module/pool.rs
@@ -121,6 +121,7 @@ pub trait PoolRpc {
     /// ## Errors
     ///
     /// * [`PoolRejectedTransactionByOutputsValidator (-1102)`](../enum.RPCError.html#variant.PoolRejectedTransactionByOutputsValidator) - The transaction is rejected by the validator specified by `outputs_validator`. If you really want to send transactions with advanced scripts, please set `outputs_validator` to "passthrough".
+    /// * [`PoolRejectedTransactionByMinFeeRate (-1104)`](../enum.RPCError.html#variant.PoolRejectedTransactionByMinFeeRate) - The transaction fee rate must be greater than or equal to the config option `tx_pool.min_fee_rate`.
     /// * [`PoolRejectedTransactionByMaxAncestorsCountLimit (-1105)`](../enum.RPCError.html#variant.PoolRejectedTransactionByMaxAncestorsCountLimit) - The ancestors count must be greater than or equal to the config option `tx_pool.max_ancestors_count`.
     /// * [`PoolRejectedDuplicatedTransaction (-1107)`](../enum.RPCError.html#variant.PoolRejectedDuplicatedTransaction) - The transaction is already in the pool.
     /// * [`TransactionFailedToResolve (-301)`](../enum.RPCError.html#variant.TransactionFailedToResolve) - Failed to resolve the referenced cells and headers used in the transaction, as inputs or dependencies.