diff --git a/README.md b/README.md
index fd5e89ca71049be22c467a49b468e07bf80a4f61..d95db44f4c132b59b2bc9675f94aea9d17d06d8e 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ Infrastructures entrelacées, an exhibition by the collective Artivistic at SKOL
 
 Requires Django 1.5
 First create and install a virtual environment [1]. Then:
-    sudo aptitude install libxml2-dev libxslt-dev
+    sudo aptitude install python-dev libxml2-dev libxslt-dev
     pip install "django<1.6" south Markdown html5tidy python-dateutil rdflib pytz six isodate lxml
     pip install https://github.com/devjones/PyEtherpadLite/archive/master.zip
     pip install https://github.com/aleray/markdown-figures/archive/master.zip