diff --git a/Modules/_testcapi/parts.h b/Modules/_testcapi/parts.h
index 1111021e1852b3..54cddf4b0929f2 100644
--- a/Modules/_testcapi/parts.h
+++ b/Modules/_testcapi/parts.h
@@ -1,3 +1,3 @@
 #include "Python.h"
 
-PyAPI_FUNC(int) _PyTestCapi_Init_Vectorcall(PyObject *module);
+int _PyTestCapi_Init_Vectorcall(PyObject *module);
diff --git a/Modules/_testcapi/vectorcall.c b/Modules/_testcapi/vectorcall.c
index 63c31c252428d8..9bc702905caf76 100644
--- a/Modules/_testcapi/vectorcall.c
+++ b/Modules/_testcapi/vectorcall.c
@@ -229,7 +229,7 @@ static PyTypeObject MethodDescriptor2_Type = {
 };
 
 
-PyAPI_FUNC(int) 
+int
 _PyTestCapi_Init_Vectorcall(PyObject *m) {
     if (PyModule_AddFunctions(m, TestMethods) < 0) {
         return -1;