diff --git a/Include/pyerrors.h b/Include/pyerrors.h
index 4bb3c01..9e84d63 100644
--- a/Include/pyerrors.h
+++ b/Include/pyerrors.h
@@ -198,8 +198,6 @@ PyAPI_FUNC(PyObject *) PyErr_Format(
     );
 
 #ifdef MS_WINDOWS
-PyAPI_FUNC(PyObject *) PyErr_SetFromWindowsErrWithFilenameObject(
-    int, const char *);
 PyAPI_FUNC(PyObject *) PyErr_SetFromWindowsErrWithFilename(
     int ierr,
     const char *filename        /* decoded from the filesystem encoding */