diff --git Modules/posixmodule.c Modules/posixmodule.c
index 667a333..0d8b0d0 100644
--- Modules/posixmodule.c
+++ Modules/posixmodule.c
@@ -898,7 +898,7 @@ _Py_Gid_Converter(PyObject *obj, gid_t *p)
 #endif /* MS_WINDOWS */
 
 
-#define _PyLong_FromDev PyLong_FromLongLong
+#define _PyLong_FromDev PyLong_FromUnsignedLongLong
 
 
 #if defined(HAVE_MKNOD) && defined(HAVE_MAKEDEV)