diff --git a/src/impl_/pyclass.rs b/src/impl_/pyclass.rs
index 07bdb97ea4c..a1a55a36f56 100644
--- a/src/impl_/pyclass.rs
+++ b/src/impl_/pyclass.rs
@@ -1116,7 +1116,7 @@ impl<T> PyClassThreadChecker<T> for ThreadCheckerImpl {
 /// Trait denoting that this class is suitable to be used as a base type for PyClass.
 
 #[cfg_attr(
-    all(diagnostic_namespace, feature = "abi3"),
+    all(diagnostic_namespace, Py_LIMITED_API),
     diagnostic::on_unimplemented(
         note = "with the `abi3` feature enabled, PyO3 does not support subclassing native types"
     )