diff --git a/tools/xen/prepare_guest.sh b/tools/xen/prepare_guest.sh
index 0e112263e2..f109d723d9 100755
--- a/tools/xen/prepare_guest.sh
+++ b/tools/xen/prepare_guest.sh
@@ -22,7 +22,7 @@ STACK_USER="$3"
 # Install basics
 apt-get update
 apt-get install -y cracklib-runtime curl wget ssh openssh-server tcpdump ethtool
-apt-get install -y curl wget ssh openssh-server python-pip git vim-nox sudo
+apt-get install -y curl wget ssh openssh-server python-pip git vim-nox sudo python-netaddr
 pip install xenapi
 
 # Install XenServer guest utilities