diff --git a/check_slapdd_crc32 b/check_slapdd_crc32
index 8187b02..3426b53 100755
--- a/check_slapdd_crc32
+++ b/check_slapdd_crc32
@@ -131,9 +131,12 @@ def fix_crc32(path, crc32, lines):
     if not options.fix:
         return True
     try:
+        headers_lines = [
+            b'# AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify.\n',
+            b'# CRC32 ' + crc32.encode() + b'\n',
+        ]
         with open(path, 'wb') as fd:
-            lines = [b'# AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify.\n', b'# CRC32 %s\n' % crc32.encode()] + lines
-            for line in lines:
+            for line in headers_lines + lines:
                 fd.write(line)
     except IOError as err:
         logging.error('%s: fail to write new file content (%s)', path, err)