python · bschoenmaeckers · May 8, 2026 · May 8, 2026 · May 8, 2026 · May 8, 2026
diff --git a/Doc/data/stable_abi.dat b/Doc/data/stable_abi.dat
diff --git a/Include/boolobject.h b/Include/boolobject.h
@@ -9,7 +9,14 @@ extern "C" {
 
 // PyBool_Type is declared by object.h
 
-#define PyBool_Check(x) Py_IS_TYPE((x), &PyBool_Type)
+#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= _Py_PACK_VERSION(3, 16)
+PyAPI_FUNC(int) PyBool_Check(PyObject *x);
+#endif
+#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < _Py_PACK_VERSION(3, 16)
+#  define PyBool_Check(x) Py_IS_TYPE((x), &PyBool_Type)
+#else
+#  define PyBool_Check(x) PyBool_Check(_PyObject_CAST(x))
+#endif
 
 /* Py_False and Py_True are the only two bools in existence. */
 

diff --git a/Lib/test/test_stable_abi_ctypes.py b/Lib/test/test_stable_abi_ctypes.py
diff --git a/Misc/NEWS.d/next/C_API/2026-05-08-16-36-36.gh-issue-000000.2F1XTY.rst b/Misc/NEWS.d/next/C_API/2026-05-08-16-36-36.gh-issue-000000.2F1XTY.rst
@@ -0,0 +1,2 @@
+In the Limited C API 3.16 and newer, :c:func:`PyBool_Check` is now available
+as a function instead of a macro.
@@ -2831,3 +2831,6 @@
 
 [function.PyObject_CallFinalizerFromDealloc]
     added = '3.15'
+
+[function.PyBool_Check]
+    added = '3.16'
diff --git a/Objects/boolobject.c b/Objects/boolobject.c
@@ -225,3 +225,8 @@ struct _longobject _Py_TrueStruct = {
         { 1 }
     }
 };
+
+// Implementations for the Stable ABI
+
+#undef PyBool_Check
+int PyBool_Check(PyObject *x) { return Py_IS_TYPE(x, &PyBool_Type); }
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		In the Limited C API 3.16 and newer, :c:func:`PyBool_Check` is now available
		as a function instead of a macro.