diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index 7fe810f585fa35e..1eb2f1f3dd07da1 100644
--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -551,7 +551,7 @@ The following functions and structs are used to create
       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,