diff --git a/geo_app/schema.py b/geo_app/schema.py
index a24f676..4388d81 100644
--- a/geo_app/schema.py
+++ b/geo_app/schema.py
@@ -1138,7 +1138,7 @@ class Query(graphene.ObjectType):
             logger.info("Offer %s not found", offer_uuid)
             return None
 
-        routes = self._build_routes(db, offer_uuid, hub_uuid, limit=1)
+        routes = Query._build_routes(db, offer_uuid, hub_uuid, limit=1)
         if not routes:
             return None