diff --git a/python/pycryptsetup.c b/python/pycryptsetup.c
index 426af25a..f8dbfe24 100644
--- a/python/pycryptsetup.c
+++ b/python/pycryptsetup.c
@@ -1,7 +1,7 @@
 /*
  * Python bindings to libcryptsetup
  *
- * Copyright (C) 2009-2014, Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2009-2017, Red Hat, Inc. All rights reserved.
  * Written by Martin Sivak
  *
  * This file is free software; you can redistribute it and/or
@@ -376,7 +376,7 @@ static PyObject *CryptSetup_luksFormat(CryptSetupObject* self, PyObject *args, P
 {
 	static const char *kwlist[] = {"cipher", "cipherMode", "keysize", "hashMode", NULL};
 	char *cipher_mode = NULL, *cipher = NULL, *hashMode = NULL;
-	int keysize = 256;
+	int keysize = DEFAULT_LUKS1_KEYBITS;
 	PyObject *keysize_object = NULL;
 	struct crypt_params_luks1 params = {};
 
@@ -400,9 +400,9 @@ static PyObject *CryptSetup_luksFormat(CryptSetupObject* self, PyObject *args, P
 	} else
 		keysize = PyInt_AsLong(keysize_object);
 
-	// FIXME use #defined defaults
 	return PyObjectResult(crypt_format(self->device, CRYPT_LUKS1,
-				cipher ?: "aes", cipher_mode ?: "cbc-essiv:sha256",
+				cipher ?: DEFAULT_LUKS1_CIPHER,
+				cipher_mode ?: DEFAULT_LUKS1_MODE,
 				NULL, NULL, keysize / 8, &params));
 }