diff --git a/homeassistant/components/hassio/__init__.py b/homeassistant/components/hassio/__init__.py
index 1c246ae753b..4f6f0ed8348 100644
--- a/homeassistant/components/hassio/__init__.py
+++ b/homeassistant/components/hassio/__init__.py
@@ -76,7 +76,7 @@ SERVICE_RESTORE_PARTIAL = "restore_partial"
 
 SCHEMA_NO_DATA = vol.Schema({})
 
-SCHEMA_ADDON = vol.Schema({vol.Required(ATTR_ADDON): cv.slug})
+SCHEMA_ADDON = vol.Schema({vol.Required(ATTR_ADDON): cv.string})
 
 SCHEMA_ADDON_STDIN = SCHEMA_ADDON.extend(
     {vol.Required(ATTR_INPUT): vol.Any(dict, cv.string)}