diff --git a/osm_nbi/auth.py b/osm_nbi/auth.py
index 6cbfe68..dcf12c3 100644
--- a/osm_nbi/auth.py
+++ b/osm_nbi/auth.py
@@ -486,6 +486,7 @@
         :return: True if access granted by permission rules, False if access granted by default rules (Bug 853)
         :raises: AuthExceptionUnauthorized if access denied
         """
+        self.load_operation_to_allowed_roles()
 
         roles_required = self.operation_to_allowed_roles[role_permission]
         roles_allowed = [role["name"] for role in token_info["roles"]]