diff --git a/yunohost_dyndns.py b/yunohost_dyndns.py
index e4dcc126..cc30280e 100644
--- a/yunohost_dyndns.py
+++ b/yunohost_dyndns.py
@@ -136,6 +136,7 @@ def dyndns_update(dyn_host="dynhost.yunohost.org", domain=None, key=None, ip=Non
             with open('/etc/yunohost/dyndns/old_ip', 'w') as f:
                 f.write(new_ip)
         else:
+            os.remove('/etc/yunohost/dyndns/old_ip')
             raise YunoHostError(1, _("An error occured during DynDNS update"))