diff --git a/.travis.yml b/.travis.yml
index ef1009e..c225f27 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ addons:
       - libjson-simple-java
       - libdc1394-22
       - libdc1394-22-dev
+      - wmctrl
       # example-os build dependencies:
       - nasm