diff --git a/iwla.py b/iwla.py
index 0322bc5..b9a027b 100755
--- a/iwla.py
+++ b/iwla.py
@@ -548,7 +548,7 @@ class IWLA(object):
         self.logger.debug('Compress %s => %s' % (path, gz_path))
 
         if not os.path.exists(gz_path) or\
-           os.stat(path).st_mtime > build_time:
+           os.stat(path).st_mtime >= build_time:
             with open(path, 'rb') as f_in, gzip.open(gz_path, 'wb') as f_out:
                 f_out.write(f_in.read())