diff --git a/src/write_file.py b/src/write_file.py
index 74db2f8..bdf8620 100644
--- a/src/write_file.py
+++ b/src/write_file.py
@@ -4,7 +4,7 @@ def write_header(f):
 	# b'WOT' magic
 	f.write(b'WOT')
 	# Version number
-	f.write(bytes(0))
+	f.write(bytes([0]))
 
 def write_entry(f, salt, hashed_host, fingerprint, comment):
 	"""write_entry(file(wb), bytes[32], bytes[32], bytes[32], bytes[0…2¹⁶-1])