diff --git a/README.md b/README.md
index dcdd9b61..31fc6922 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ Requirements
 3.	[mbstring](http://www.php.net/manual/en/mbstring.installation.php) 
 4.	[PHP GD](http://www.php.net/manual/en/intro.image.php)
 5.	[PHP PDO](http://www.php.net/manual/en/intro.pdo.php)
+6.	A Unix-like OS, preferrably FreeBSD or Linux
 
 We try to make sure vichan is compatible with all major web servers and
 operating systems. vichan does not include an Apache ```.htaccess``` file nor does