diff --git a/doc/source/devref/development.environment.rst b/doc/source/devref/development.environment.rst
index 686d215a62fc..08bb967fe060 100644
--- a/doc/source/devref/development.environment.rst
+++ b/doc/source/devref/development.environment.rst
@@ -60,7 +60,7 @@ Install the prerequisite packages.
 
 On Ubuntu::
 
-  sudo apt-get install python-dev libssl-dev python-pip git-core libxml2-dev libxslt-dev
+  sudo apt-get install python-dev libssl-dev python-pip git-core libxml2-dev libxslt-dev pkg-config libffi-dev
 
 On Ubuntu Precise (12.04) you may also need to add the following packages::