diff --git a/Modules/binascii.c b/Modules/binascii.c
index 5f8705d..2b4b352 100644
--- a/Modules/binascii.c
+++ b/Modules/binascii.c
@@ -902,7 +902,7 @@
 	Py_ssize_t len;
 	long result;
 
-	if ( !PyArg_ParseTuple(args, "s#|l:crc32", &bin_data, &len, &crc) )
+	if ( !PyArg_ParseTuple(args, "s#|k:crc32", &bin_data, &len, &crc) )
 		return NULL;
 
 	crc = ~ crc;
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 3e91f00..716bf7d 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -1906,9 +1906,9 @@
 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;