diff --git a/.travis.yml b/.travis.yml
index 5a98b320..dd6bf14d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,5 +4,8 @@ language: c
 compiler:
   - gcc
   - clang
+os:
+  - linux
+  - osx
 # How to build:
 script: ./bootstrap && ./configure && make check