diff --git a/FAQ.md b/FAQ.md
index dae9ab5..36bf429 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -14,7 +14,7 @@ A: There isn't currently a way to disable or skip the encryption phase, but if y
 
 **Q: Where should I look for current documentation about the Tahoe-LAFS protocols?**
 
-A: <http://tahoe-lafs.org/source/tahoe/trunk/docs/architecture.txt>
+A: <http://tahoe-lafs.org/source/tahoe/trunk/docs/architecture.rst>
 
 **Q: Does Tahoe-LAFS work on embedded devices such as a [PogoPlug](http://www.pogoplug.com) or an [OpenWRT](http://openwrt.org) router?**