diff --git a/fig/service.py b/fig/service.py
index c0cc297c..0feb56d8 100644
--- a/fig/service.py
+++ b/fig/service.py
@@ -11,7 +11,7 @@ from .progress_stream import stream_output, StreamOutputError
 log = logging.getLogger(__name__)
 
 
-DOCKER_CONFIG_KEYS = ['image', 'command', 'hostname', 'user', 'detach', 'stdin_open', 'tty', 'mem_limit', 'ports', 'environment', 'dns', 'volumes', 'entrypoint', 'privileged', 'volumes_from', 'net', 'working_dir']
+DOCKER_CONFIG_KEYS = ['image', 'command', 'hostname', 'domainname', 'user', 'detach', 'stdin_open', 'tty', 'mem_limit', 'ports', 'environment', 'dns', 'volumes', 'entrypoint', 'privileged', 'volumes_from', 'net', 'working_dir']
 DOCKER_CONFIG_HINTS = {
     'link'      : 'links',
     'port'      : 'ports',