diff --git a/homeassistant/const.py b/homeassistant/const.py
index a4ea2651d28..1c48cc51774 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -142,3 +142,4 @@ HTTP_HEADER_CACHE_CONTROL = "Cache-Control"
 HTTP_HEADER_EXPIRES = "Expires"
 
 CONTENT_TYPE_JSON = "application/json"
+CONTENT_TYPE_MULTIPART = 'multipart/x-mixed-replace; boundary={}'