diff --git a/scrapy/trunk/INSTALL b/scrapy/trunk/INSTALL
index b101fd26f..98d39001c 100644
--- a/scrapy/trunk/INSTALL
+++ b/scrapy/trunk/INSTALL
@@ -13,6 +13,8 @@ If this is not the case, you can add the following lines to a file
 import sys
 sys.setdefaultencoding('utf-8')
 
+In Debian/Ubuntu the sitecustomize.py file may be found in /etc/python or
+/etc/python2.5.
 
 INSTALLING LIBRARIES
 --------------------