diff --git a/scrapy/trunk/docs/ref/settings.rst b/scrapy/trunk/docs/ref/settings.rst
index 06b442c41..2f3584547 100644
--- a/scrapy/trunk/docs/ref/settings.rst
+++ b/scrapy/trunk/docs/ref/settings.rst
@@ -233,6 +233,15 @@ Number of domains to scrape concurrently in one process. This doesn't affect
 the number of domains scraped concurrently by the Scrapy cluster which spawns a
 new process per domain.
 
+.. setting:: COOKIES_DEBUG
+
+COOKIES_DEBUG
+-------------
+
+Default: ``False``
+
+Enable debugging message of Cookies Downloader Middleware.
+
 .. setting:: DEFAULT_ITEM_CLASS
 
 DEFAULT_ITEM_CLASS
diff --git a/scrapy/trunk/scrapy/conf/default_settings.py b/scrapy/trunk/scrapy/conf/default_settings.py
index cde4d77f2..2ee605389 100644
--- a/scrapy/trunk/scrapy/conf/default_settings.py
+++ b/scrapy/trunk/scrapy/conf/default_settings.py
@@ -45,6 +45,8 @@ COMMANDS_SETTINGS_MODULE = ''
 
 CONCURRENT_DOMAINS = 8    # number of domains to scrape in parallel
 
+COOKIES_DEBUG = False
+
 DEFAULT_ITEM_CLASS = 'scrapy.item.ScrapedItem'
 
 DEFAULT_SPIDER = None