diff --git a/homeassistant/components/notify/hangouts.py b/homeassistant/components/notify/hangouts.py
index eb2880e8a46..01f98146f4c 100644
--- a/homeassistant/components/notify/hangouts.py
+++ b/homeassistant/components/notify/hangouts.py
@@ -11,10 +11,10 @@ import voluptuous as vol
 from homeassistant.components.notify import (ATTR_TARGET, PLATFORM_SCHEMA,
                                              NOTIFY_SERVICE_SCHEMA,
                                              BaseNotificationService,
-                                             ATTR_MESSAGE)
+                                             ATTR_MESSAGE, ATTR_DATA)
 
 from homeassistant.components.hangouts.const \
-    import (DOMAIN, SERVICE_SEND_MESSAGE,
+    import (DOMAIN, SERVICE_SEND_MESSAGE, MESSAGE_DATA_SCHEMA,
             TARGETS_SCHEMA, CONF_DEFAULT_CONVERSATIONS)
 
 _LOGGER = logging.getLogger(__name__)
@@ -26,7 +26,8 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
 })
 
 NOTIFY_SERVICE_SCHEMA = NOTIFY_SERVICE_SCHEMA.extend({
-    vol.Optional(ATTR_TARGET): [TARGETS_SCHEMA]
+    vol.Optional(ATTR_TARGET): [TARGETS_SCHEMA],
+    vol.Optional(ATTR_DATA, default={}): MESSAGE_DATA_SCHEMA
 })
 
 
@@ -59,7 +60,8 @@ class HangoutsNotificationService(BaseNotificationService):
         messages.append({'text': message, 'parse_str': True})
         service_data = {
             ATTR_TARGET: target_conversations,
-            ATTR_MESSAGE: messages
+            ATTR_MESSAGE: messages,
+            ATTR_DATA: kwargs[ATTR_DATA]
         }
 
         return self.hass.services.call(