diff --git a/crates/optimism/rpc/src/eth/transaction.rs b/crates/optimism/rpc/src/eth/transaction.rs
index a4b4c064970da..ab7525016a1ac 100644
--- a/crates/optimism/rpc/src/eth/transaction.rs
+++ b/crates/optimism/rpc/src/eth/transaction.rs
@@ -116,7 +116,8 @@ impl TransactionCompat for OpTxBuilder {
             source_hash: signed_tx.source_hash(),
             mint: signed_tx.mint(),
             // only include is_system_tx if true: <https://github.com/ethereum-optimism/op-geth/blob/641e996a2dcf1f81bac9416cb6124f86a69f1de7/internal/ethapi/api.go#L1518-L1518>
-            is_system_tx: signed_tx.is_deposit().then_some(signed_tx.is_system_transaction()),
+            is_system_tx: (signed_tx.is_deposit() && signed_tx.is_system_transaction())
+                .then_some(true),
             deposit_receipt_version: None, // todo: how to fill this field?
         }
     }