diff --git a/.travis.yml b/.travis.yml
index 0c41c00..917133f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ addons:
   apt:
     packages:
       - zsh
+      - build-essential
     #  - ksh
     #  - gcc-4.8
     #  - g++-4.8