diff --git a/README.md b/README.md
index 9c03baa..50df4c8 100644
--- a/README.md
+++ b/README.md
@@ -33,5 +33,15 @@ This is the script that is called by the cron job.
 + Then they are compared to DNS records for the configured host and domain.
 + In case of mismatch Gandi live DNS API is called to update the DNS records
 
+Information logs are written to system log. Exemple : 
+```
+Feb 29 20:12:02 passerelle root: WAN IPv4 : 1.2.3.4
+Feb 29 20:12:02 passerelle root: WAN IPv6 : 1111:2222:3333:4444:5555:6666:7777:8888
+Feb 29 20:12:02 passerelle root: DNS IPv4 : 1.2.3.4
+Feb 29 20:12:02 passerelle root: DNS IPv6 : 1111:2222:3333:4444:5555:6666:7777:8888
+Feb 29 20:12:02 passerelle root: No need to update IPv4 DNS record for sub.domain.tld
+Feb 29 20:12:02 passerelle root: No need to update IPv6 DNS record for sub.domain.tld
+```
+
 This script is based on this sample provided by Gandi on their GitHub : [mywanip.sh](https://github.com/Gandi/api-examples/blob/master/bash/livedns/mywanip.sh)