diff --git a/slapos/libnetworkcache.py b/slapos/libnetworkcache.py
index 647f9bb2b3daafb9aa54ba7be7f339929c2bcc74..b93cfc42a08335dce05932dbc6c356daf17faefc 100644
--- a/slapos/libnetworkcache.py
+++ b/slapos/libnetworkcache.py
@@ -217,7 +217,7 @@ class NetworkcacheClient(object):
       try:
         loaded_certificate = crypto.load_certificate(crypto.FILETYPE_PEM, certificate)
       except Exception as e:
-        logger.info('Ignored wrong certificate, reason:\n%s, offending certificate:\n%s', e.message, certificate)
+        logger.info('Ignored wrong certificate, reason:\n%s, offending certificate:\n%s', e, certificate)
       self.signature_certificate_list.append(loaded_certificate)
 
   # NetworkcacheClient context manager catches all exceptions and logs them