diff --git a/test/utils/docker/ubuntu1204/Dockerfile b/test/utils/docker/ubuntu1204/Dockerfile
index 79542d5d22..347f911613 100644
--- a/test/utils/docker/ubuntu1204/Dockerfile
+++ b/test/utils/docker/ubuntu1204/Dockerfile
@@ -43,6 +43,7 @@ RUN /usr/sbin/update-rc.d -f ondemand remove; \
 
 RUN apt-get install -y \
     python-coverage \
+    python-dev \
     python-httplib2 \
     python-jinja2 \
     python-keyczar \