diff --git a/scrapy/extensions/httpcache.py b/scrapy/extensions/httpcache.py
index 1b5e05b1b..35c77add8 100644
--- a/scrapy/extensions/httpcache.py
+++ b/scrapy/extensions/httpcache.py
@@ -31,7 +31,7 @@ class DummyPolicy(object):
     def should_cache_response(self, response, request):
         return response.status not in self.ignore_http_codes
 
-    def is_cached_response_fresh(self, response, request):
+    def is_cached_response_fresh(self, cachedresponse, request):
         return True
 
     def is_cached_response_valid(self, cachedresponse, response, request):