diff --git a/docs/faq.rst b/docs/faq.rst
index 1e969af69..57d1a35e7 100644
--- a/docs/faq.rst
+++ b/docs/faq.rst
@@ -245,3 +245,9 @@ How can I instruct a spider to stop itself?
 
 Raise the :exc:`~scrapy.exceptions.CloseSpider` exception from a callback. For
 more info see: :exc:`~scrapy.exceptions.CloseSpider`.
+
+I'm getting a `OSError: [Errno 4] Interrupted system call` on ``scrapy deploy``
+-------------------------------------------------------------------------------
+
+This only appears to happen on Mac OS X and Python 2.5. Upgrading to Python 2.6
+(or above) is known to fix the issue.