diff --git a/hassio/addons/validate.py b/hassio/addons/validate.py
index 3e36161cc..07e3f91b4 100644
--- a/hassio/addons/validate.py
+++ b/hassio/addons/validate.py
@@ -116,7 +116,7 @@ SCHEMA_ADDON_CONFIG = vol.Schema({
     }), False),
     vol.Optional(ATTR_IMAGE): vol.Match(r"^[\w{}]+/[\-\w{}]+$"),
     vol.Optional(ATTR_TIMEOUT, default=10):
-        vol.All(vol.Coerce(int), vol.Range(min=10, max=120))
+        vol.All(vol.Coerce(int), vol.Range(min=10, max=120)),
 }, extra=vol.REMOVE_EXTRA)
 
 
diff --git a/hassio/const.py b/hassio/const.py
index cd0efac06..c713f0143 100644
--- a/hassio/const.py
+++ b/hassio/const.py
@@ -127,7 +127,7 @@ ATTR_SECURITY = 'security'
 ATTR_BUILD_FROM = 'build_from'
 ATTR_SQUASH = 'squash'
 ATTR_GPIO = 'gpio'
-ATTR_LEGACY = 'ATTR_LEGACY'
+ATTR_LEGACY = 'legacy'
 ATTR_ADDONS_CUSTOM_LIST = 'addons_custom_list'
 
 STARTUP_INITIALIZE = 'initialize'
diff --git a/hassio/dock/addon.py b/hassio/dock/addon.py
index e41d991e9..34ecb3b3f 100644
--- a/hassio/dock/addon.py
+++ b/hassio/dock/addon.py
@@ -188,6 +188,7 @@ class DockerAddon(DockerInterface):
             name=self.name,
             hostname=self.hostname,
             detach=True,
+            init=True,
             stdin_open=self.addon.with_stdin,
             network_mode=self.network_mode,
             ports=self.ports,