diff --git a/bp/product/routes.py b/bp/product/routes.py
index 7eae4c6..dc05d74 100644
--- a/bp/product/routes.py
+++ b/bp/product/routes.py
@@ -25,7 +25,9 @@ def register():
     bp = Blueprint("product", __name__, url_prefix="/product/<slug>")
     @bp.url_value_preprocessor
     def pull_blog(endpoint, values):
-      g.product_slug = values.get("slug")
+      # App-level preprocessor pops "slug" into g.post_slug before this runs,
+      # so values.get("slug") is None. Fall back to g.post_slug.
+      g.product_slug = values.get("slug") or getattr(g, "post_slug", None)
 
     # ─────────────────────────────────────────────────────────────
     # BEFORE REQUEST: Slug or numeric ID resolver