diff --git a/sync/src/relayer/transaction_process.rs b/sync/src/relayer/transaction_process.rs
index cf9f6ab45d..396cd35c78 100644
--- a/sync/src/relayer/transaction_process.rs
+++ b/sync/src/relayer/transaction_process.rs
@@ -69,7 +69,8 @@ where
                 }
             }
             Err(PoolError::InvalidTx(TransactionError::UnknownInput))
-            | Err(PoolError::InvalidTx(TransactionError::Conflict)) => {
+            | Err(PoolError::InvalidTx(TransactionError::Conflict))
+            | Err(PoolError::InvalidTx(TransactionError::Immature)) => {
                 // this error may occured when peer's tip is different with us,
                 // we can't proof peer is bad so just ignore this
                 debug!(target: "relay", "peer {} relay a conflict or missing input tx: {:?}", self.peer, tx);