diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index 48eb16bd90834ba..6b68c0d085589a1 100644
--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -639,7 +639,7 @@ but need extra remarks for use as slots:
    in the following situations:
 
    - The base is not variable-sized (its
-     :c:member:`~PyTypeObject.tp_itemsize`).
+     :c:member:`~PyTypeObject.tp_itemsize` is zero).
    - The requested :c:member:`PyType_Spec.basicsize` is positive,
      suggesting that the memory layout of the base class is known.
    - The requested :c:member:`PyType_Spec.basicsize` is zero,