diff --git a/appservice.py b/appservice.py
index 293a4b2..7dc9049 100644
--- a/appservice.py
+++ b/appservice.py
@@ -44,6 +44,7 @@ def on_receive_events(transaction):
                     text = "* " + get_displayname(event["user_id"]) + " " + event['content']['body']
             elif event['content']['msgtype'] == 'm.image':
                 imgurl = app.config['MATRIX_HOST'] + '/_matrix/media/r0/download/' + event['content']['url'][6:]
+                thmburl = app.config['MATRIX_HOST'] + '/_matrix/media/r0/download/' + event['content']['info']['thumbnail_url'][6:]
                 value = {"type": "photo", "version": "1.0"}
                 value["title"] = event['content']['body']
                 value["url"] = imgurl
@@ -51,7 +52,7 @@ def on_receive_events(transaction):
                 value["height"] = event['content']['info']['h']
                 value["thumbnail_width"] = event['content']['info']['thumbnail_info']['w']
                 value["thumbnail_height"] = event['content']['info']['thumbnail_info']['h']
-                value["thumbnail_url"] = self.api.get_download_url(event['content']['info']['thumbnail_url'])
+                value["thumbnail_url"] = thmburl
                 rawitem = {"type": "io.pnut.core.oembed", "value": value}
                 embed = [rawitem]
                 if user: