diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index f73b73e..6a72166 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -1881,9 +1881,9 @@
 posix_chown(PyObject *self, PyObject *args)
 {
 	char *path = NULL;
-	int uid, gid;
+	long uid, gid;
 	int res;
-	if (!PyArg_ParseTuple(args, "etii:chown",
+	if (!PyArg_ParseTuple(args, "etll:chown",
 	                      Py_FileSystemDefaultEncoding, &path,
 	                      &uid, &gid))
 		return NULL;