diff --git a/doc/manual/installing.rst b/doc/manual/installing.rst
index e821b8a07..5c5f14dc0 100644
--- a/doc/manual/installing.rst
+++ b/doc/manual/installing.rst
@@ -165,7 +165,7 @@ Xubuntu 14.04 specific instructions
 
 This command installs all the required packages: ::
 
-    $ sudo apt-get install build-essential autotools-dev file git patch perl xutils-devs python3-pip texinfo flex bison libmpc-dev python3-serial python3-prettytable python3-setuptools python3-numpy python3-scipy python3-sphinx python3-dev python-dev subversion cmake libusb-dev libftdi-dev pkg-config
+    $ sudo apt-get install build-essential autotools-dev file git patch perl xutils-devs python3-pip texinfo flex bison libmpc-dev python3-serial python3-dateutil python3-prettytable python3-setuptools python3-numpy python3-scipy python3-sphinx python3-dev python-dev subversion cmake libusb-dev libftdi-dev pkg-config
 
 Note that ARTIQ requires Python 3.4 or above.