diff --git a/app/post/routes.py b/app/post/routes.py
index 8f9c3fb1..24680ab0 100644
--- a/app/post/routes.py
+++ b/app/post/routes.py
@@ -718,6 +718,10 @@ def add_reply(post_id: int, comment_id: int):
                     in_reply_to.author.public_url()
                 ],
                 'content': reply.body_html,
+                'source': {
+                    'content': reply.body,
+                    'mediaType': 'text/markdown'
+                },
                 'inReplyTo': in_reply_to.profile_id(),
                 'url': reply.profile_id(),
                 'mediaType': 'text/html',