diff --git a/crates/optimism/evm/src/l1.rs b/crates/optimism/evm/src/l1.rs
index 7b605448ff3..66093e857b4 100644
--- a/crates/optimism/evm/src/l1.rs
+++ b/crates/optimism/evm/src/l1.rs
@@ -190,7 +190,9 @@ impl RethL1BlockInfo for L1BlockInfo {
             return Ok(U256::ZERO)
         }
 
-        let spec_id = if chain_spec.is_fork_active_at_timestamp(Hardfork::Regolith, timestamp) {
+        let spec_id = if chain_spec.is_fork_active_at_timestamp(Hardfork::Ecotone, timestamp) {
+            SpecId::ECOTONE
+        } else if chain_spec.is_fork_active_at_timestamp(Hardfork::Regolith, timestamp) {
             SpecId::REGOLITH
         } else if chain_spec.is_fork_active_at_timestamp(Hardfork::Bedrock, timestamp) {
             SpecId::BEDROCK