diff --git a/feeds.py b/feeds.py

index 2953fe0..9055aa7 100644

--- a/feeds.py

+++ b/feeds.py

@@ -139,7 +139,7 @@ def make_post_page_or_configure_feed(session):

             return 10, f'New post in {session.context.title()}: (see Help for special commands)'

         seg_text = clean_query(req)

     else:

- if not req.content_mime.startswith('text/'):

+ if req.content_mime and not req.content_mime.startswith('text/'):

             return 50, 'Content must be text'

         seg_text = req.content.decode('utf-8')