diff --git a/README.rst b/README.rst
index 65045b3..d98b856 100644
--- a/README.rst
+++ b/README.rst
@@ -64,6 +64,7 @@ Supported Scrapy settings
 * ``DELTAFETCH_ENABLED`` — to enable (or disable) this extension
 * ``DELTAFETCH_DIR`` — directory where to store state
 * ``DELTAFETCH_RESET`` — reset the state, clearing out all seen requests
+* ``DELTAFETCH_USE_REDIRECT_URL`` - use/store redirect url fingerprint
 
 These usually go in your Scrapy project's ``settings.py``.
 
diff --git a/scrapy_deltafetch/middleware.py b/scrapy_deltafetch/middleware.py
index ded0843..6fb3c60 100644
--- a/scrapy_deltafetch/middleware.py
+++ b/scrapy_deltafetch/middleware.py
@@ -25,7 +25,7 @@ class DeltaFetch(object):
     intensive).
     """
 
-    def __init__(self, dir, reset=False, stats=None):
+    def __init__(self, dir, reset=False, store_redirect_url=False, stats=None):
         dbmodule = None
         try:
             dbmodule = __import__('bsddb3').db
@@ -34,6 +34,7 @@ def __init__(self, dir, reset=False, stats=None):
         self.dbmodule = dbmodule
         self.dir = dir
         self.reset = reset
+        self.store_redirect_url = store_redirect_url
         self.stats = stats
 
     @classmethod
@@ -43,7 +44,8 @@ def from_crawler(cls, crawler):
             raise NotConfigured
         dir = data_path(s.get('DELTAFETCH_DIR', 'deltafetch'))
         reset = s.getbool('DELTAFETCH_RESET')
-        o = cls(dir, reset, crawler.stats)
+        store_redirect_url = s.getbool('DELTAFETCH_USE_REDIRECT_URL', False)
+        o = cls(dir, reset, store_redirect_url, crawler.stats)
         crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
         crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)
         return o
@@ -82,7 +84,12 @@ def process_spider_output(self, response, result, spider):
                         self.stats.inc_value('deltafetch/skipped', spider=spider)
                     continue
             elif isinstance(r, (BaseItem, dict)):
-                key = self._get_key(response.request)
+                req = response.request
+                redirect_urls = req.meta.get('redirect_urls', False)
+
+                if self.store_redirect_url and redirect_urls:
+                    req = req.replace(url=redirect_urls[0])
+                key = self._get_key(req)
                 self.db[key] = str(time.time())
                 if self.stats:
                     self.stats.inc_value('deltafetch/stored', spider=spider)