diff --git a/libcloud/dns/drivers/digitalocean.py b/libcloud/dns/drivers/digitalocean.py
index e393b05ad7..08f413bb38 100644
--- a/libcloud/dns/drivers/digitalocean.py
+++ b/libcloud/dns/drivers/digitalocean.py
@@ -171,15 +171,15 @@ def create_record(self, name, zone, type, data, extra=None):
             try:
                 params['priority'] = extra['priority']
             except KeyError:
-                params['priority'] = 'null'
+                params['priority'] = None
             try:
                 params['port'] = extra['port']
             except KeyError:
-                params['port'] = 'null'
+                params['port'] = None
             try:
                 params['weight'] = extra['weight']
             except KeyError:
-                params['weight'] = 'null'
+                params['weight'] = None
 
             if 'ttl' in extra:
                 params['ttl'] = extra['ttl']