diff --git a/crates/optimism/node/src/txpool.rs b/crates/optimism/node/src/txpool.rs
index 90e0b33c22..62ee3a820f 100644
--- a/crates/optimism/node/src/txpool.rs
+++ b/crates/optimism/node/src/txpool.rs
@@ -61,22 +61,12 @@ impl OpPooledTransaction {
     /// This value is computed based on the following formula:
     /// `max(minTransactionSize, intercept + fastlzCoef*fastlzSize)`
     pub fn estimated_compressed_size(&self) -> u64 {
-        *self
-            .estimated_tx_compressed_size
-            .get_or_init(|| tx_estimated_size_fjord(&self.inner.transaction().encoded_2718()))
+        *self.estimated_tx_compressed_size.get_or_init(|| {
+            op_alloy_flz::tx_estimated_size_fjord(&self.inner.transaction().encoded_2718())
+        })
     }
 }
 
-/// Calculate the estimated compressed transaction size in bytes, scaled by 1e6.
-/// This value is computed based on the following formula:
-/// max(minTransactionSize, intercept + fastlzCoef*fastlzSize)
-// TODO(mattsse): replace with library fn from revm or maili once available
-fn tx_estimated_size_fjord(input: &[u8]) -> u64 {
-    let fastlz_size = op_alloy_flz::flz_compress_len(input) as u64;
-
-    fastlz_size.saturating_mul(836_500).saturating_sub(42_585_600).max(100_000_000)
-}
-
 impl From<Recovered<op_alloy_consensus::OpPooledTransaction>> for OpPooledTransaction {
     fn from(tx: Recovered<op_alloy_consensus::OpPooledTransaction>) -> Self {
         let encoded_len = tx.encode_2718_len();