diff --git a/crates/primitives/src/specification.rs b/crates/primitives/src/specification.rs
index 0480f1a9ff..68dd7602a5 100644
--- a/crates/primitives/src/specification.rs
+++ b/crates/primitives/src/specification.rs
@@ -195,7 +195,7 @@ spec!(CANYON, CanyonSpec);
 spec!(ECOTONE, EcotoneSpec);
 
 // Taiko Hardforks
-#[cfg(feature = "taiko")]
+#[cfg(all(feature = "taiko", not(feature = "optimism")))]
 spec!(KATLA, KatlaSpec);
 
 #[macro_export]