diff --git a/src/yunohost/certificate.py b/src/yunohost/certificate.py
index b91bc74b6..a53f5f669 100644
--- a/src/yunohost/certificate.py
+++ b/src/yunohost/certificate.py
@@ -820,9 +820,11 @@ def _domain_is_accessible_through_HTTP(ip, domain):
 def _domain_is_resolved_locally(public_ip, domain):
     try:
         ip = socket.gethostbyname(domain)
-    except socket.error:
+    except socket.error as e:
+        logger.debug("Couldn't get domain '%s' ip because: %s" % (domain, e))
         return False
 
+    logger.debug("Domain '%s' ip is %s, except it to be 127.0.0.1 or %s" % (domain, public_ip))
     return ip in ["127.0.0.1", public_ip]