diff --git a/scrapy/trunk/scrapy/contrib/spiders.py b/scrapy/trunk/scrapy/contrib/spiders.py
index 68da93b04..8a8404e81 100644
--- a/scrapy/trunk/scrapy/contrib/spiders.py
+++ b/scrapy/trunk/scrapy/contrib/spiders.py
@@ -81,6 +81,9 @@ class CrawlSpider(BasicSpider):
             if hasattr(self, callback_name):
                 if extractor.match(response.url):
                     ret.extend(getattr(self, callback_name)(response))
+        for entry in ret:
+            if isinstance(entry, ScrapedItem):
+                self.set_guid(entry)
         return ret
 
 class XMLFeedSpider(BasicSpider):