diff --git a/crates/transaction-pool/src/pool/mod.rs b/crates/transaction-pool/src/pool/mod.rs
index 9eb741a6a9..0b53af5658 100644
--- a/crates/transaction-pool/src/pool/mod.rs
+++ b/crates/transaction-pool/src/pool/mod.rs
@@ -660,6 +660,9 @@ where
 
     /// Removes all transactions that are present in the pool.
     pub(crate) fn retain_unknown(&self, hashes: &mut Vec<TxHash>) {
+        if hashes.is_empty() {
+            return
+        }
         let pool = self.pool.read();
         hashes.retain(|tx| !pool.contains(tx))
     }