diff --git a/softtoken/softtoken.py b/softtoken/softtoken.py
index 7015253..64c4ead 100644
--- a/softtoken/softtoken.py
+++ b/softtoken/softtoken.py
@@ -142,7 +142,7 @@ def main():
         sys.exit(2)
 
     if args.hash_function == 'sha1':
-        hf = hashlib.sha256
+        hf = hashlib.sha1
     elif args.hash_function == 'sha256':
         hf = hashlib.sha256
     elif args.hash_function == 'sha512':