diff --git a/app/models/backend/ecs/v2/service_stack.rb b/app/models/backend/ecs/v2/service_stack.rb
index 204d70f8..d253db05 100644
--- a/app/models/backend/ecs/v2/service_stack.rb
+++ b/app/models/backend/ecs/v2/service_stack.rb
@@ -5,7 +5,7 @@ def build_resources
         deps = []
         if use_alb?
           deps = []
-          if !service.heritage.review?
+          if !service&.heritage&.review?
             deps << 'LBListenerRuleHTTP'
           end