diff --git a/pagure/ui/repo.py b/pagure/ui/repo.py
index 845887b..f8aa621 100644
--- a/pagure/ui/repo.py
+++ b/pagure/ui/repo.py
@@ -414,6 +414,8 @@ def view_raw_file(repo, identifier, filename=None, username=None):
         try:
             commit = repo_obj.get(identifier)
         except ValueError:
+            if 'master' not in repo_obj.listall_branches():
+                flask.abort(404, 'Branch no found')
             # If it's not a commit id then it's part of the filename
             commit = repo_obj[repo_obj.head.target]