diff --git a/docsite/rst/intro_windows.rst b/docsite/rst/intro_windows.rst
index 645248fde5..ff8d99a88f 100644
--- a/docsite/rst/intro_windows.rst
+++ b/docsite/rst/intro_windows.rst
@@ -30,6 +30,7 @@ On a Linux control machine::
 
 If you wish to connect to domain accounts published through Active Directory (as opposed to local accounts created on the remote host)::
 
+   sudo apt-get install python-dev libkrb5-dev
    pip install kerberos
 
 Kerberos is installed and configured by default on OS X and many Linux distributions. If your control machine has not already done this for you, you will need to.