pygost/asn1schemas/cert-selfsigned-example.py | 3 ++-

diff --git a/pygost/asn1schemas/cert-selfsigned-example.py b/pygost/asn1schemas/cert-selfsigned-example.py
index 1ecd1e438ab174f6354d31bd59fc760e014f3cea6a6c03aa6dea809469f21afc..046f042656e5e55fc58a80e9b559502d83b729dcba276384d289d58df60dc9e5 100755
--- a/pygost/asn1schemas/cert-selfsigned-example.py
+++ b/pygost/asn1schemas/cert-selfsigned-example.py
@@ -8,6 +8,7 @@ from base64 import standard_b64encode
 from datetime import datetime
 from datetime import timedelta
 from os import urandom
+from sys import exit as sys_exit
 from sys import stdout
 from textwrap import fill
 
@@ -240,7 +241,7 @@         ("privateKey", PrivateKey(OctetString(prv_raw).encode())),
     ))), file=out)
     print("-----END PRIVATE KEY-----", file=out)
     if args.only_key:
-        exit()
+        sys_exit()
     prv = prv_unmarshal(prv_raw)
 
 curve = ai["curve"]