diff --git a/hassio/addons/validate.py b/hassio/addons/validate.py
index d2f7eb27c..6979e56d1 100644
--- a/hassio/addons/validate.py
+++ b/hassio/addons/validate.py
@@ -4,12 +4,12 @@ import voluptuous as vol
 from ..const import (
     ATTR_NAME, ATTR_VERSION, ATTR_SLUG, ATTR_DESCRIPTON, ATTR_STARTUP,
     ATTR_BOOT, ATTR_MAP, ATTR_OPTIONS, ATTR_PORTS, STARTUP_ONCE, STARTUP_AFTER,
-    STARTUP_BEFORE, BOOT_AUTO, BOOT_MANUAL, ATTR_SCHEMA, ATTR_IMAGE,
-    ATTR_URL, ATTR_MAINTAINER, ATTR_ARCH, ATTR_DEVICES, ATTR_ENVIRONMENT,
-    ARCH_ARMHF, ARCH_AARCH64, ARCH_AMD64, ARCH_I386)
+    STARTUP_BEFORE, BOOT_AUTO, BOOT_MANUAL, ATTR_SCHEMA, ATTR_IMAGE, ATTR_URL,
+    ATTR_MAINTAINER, ATTR_ARCH, ATTR_DEVICES, ATTR_ENVIRONMENT, ARCH_ARMHF,
+    ARCH_AARCH64, ARCH_AMD64, ARCH_I386)
 
 
-MAP_VOLUME = r"^(config|ssl|addons|backup|share|mnt)(?::(rw|:ro))?$"
+MAP_VOLUME = r"^(config|ssl|addons|backup|share)(?::(rw|:ro))?$"
 
 V_STR = 'str'
 V_INT = 'int'
diff --git a/hassio/const.py b/hassio/const.py
index 9e9201f82..ee71b7179 100644
--- a/hassio/const.py
+++ b/hassio/const.py
@@ -78,6 +78,7 @@ ATTR_BUILD = 'build'
 ATTR_DEVICES = 'devices'
 ATTR_ENVIRONMENT = 'environment'
 
+STARTUP_FIRST = 'first'
 STARTUP_BEFORE = 'before'
 STARTUP_AFTER = 'after'
 STARTUP_ONCE = 'once'
@@ -93,7 +94,6 @@ MAP_SSL = 'ssl'
 MAP_ADDONS = 'addons'
 MAP_BACKUP = 'backup'
 MAP_SHARE = 'share'
-MAP_MNT = 'mnt'
 
 ARCH_ARMHF = 'armhf'
 ARCH_AARCH64 = 'aarch64'
diff --git a/hassio/dock/addon.py b/hassio/dock/addon.py
index 86b33eb5d..1dd1948d3 100644
--- a/hassio/dock/addon.py
+++ b/hassio/dock/addon.py
@@ -8,8 +8,7 @@ import docker
 from . import DockerBase
 from .util import dockerfile_template
 from ..const import (
-    META_ADDON, MAP_CONFIG, MAP_SSL, MAP_ADDONS, MAP_BACKUP, MAP_SHARE,
-    MAP_MNT)
+    META_ADDON, MAP_CONFIG, MAP_SSL, MAP_ADDONS, MAP_BACKUP, MAP_SHARE)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -69,12 +68,6 @@ class DockerAddon(DockerBase):
                     'bind': '/share', 'mode': addon_mapping[MAP_SHARE]
                 }})
 
-        if MAP_MNT in addon_mapping:
-            volumes.update({
-                '/mnt': {
-                    'bind': '/mnt', 'mode': addon_mapping[MAP_MNT]
-                }})
-
         return volumes
 
     def _run(self):