diff --git a/.travis.yml b/.travis.yml
index 102e9a6..1860eff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,5 +18,6 @@ addons:
     - camlp4
     - camlp4-extra
     - time
+    - libxen-dev
 env:
   - FORK_USER=talex5 FORK_BRANCH=unikernel OCAML_VERSION=4.02 MIRAGE_BACKEND=xen PINS="mirage-xen:https://github.com/talex5/mirage-platform.git#mm mirage-nat:https://github.com/talex5/mirage-nat.git#simplify-checksum tcpip:https://github.com/mirage/mirage-tcpip.git"