diff --git a/AdvancedInstall.md b/AdvancedInstall.md
index a5b477a..a6535fe 100644
--- a/AdvancedInstall.md
+++ b/AdvancedInstall.md
@@ -200,7 +200,7 @@ that aren't already in Debian proper.
 
 It is also possible to create a binary distribution using [http://pypi.python.org/pypi/bbfreeze bb-freeze].
 Install bb-freeze, then in the root of a Tahoe source tree with full path
-`<tahoedir>`, on WIndows do:
+`<tahoedir>`, on Windows do:
 ```
 python setup.py build
 set PYTHONPATH=<tahoedir>\support\Lib\site-packages;<tahoedir>\src