diff --git a/backend/app/api.py b/backend/app/api.py
index bf4c7a3..880d891 100644
--- a/backend/app/api.py
+++ b/backend/app/api.py
@@ -731,7 +731,7 @@ def make_router(
             await bot.mark_entry_reviewed(
                 viewer.as_actor(),
                 org=config.gitea_org,
-                meta_repo=projects_mod.default_content_repo(config),
+                meta_repo=(projects_mod.default_content_repo(config) or ""),
                 slug=slug,
                 reviewed_by=viewer.gitea_login,
                 reviewed_at=entry_mod.today(),