diff --git a/.travis.yml b/.travis.yml
index df89593c4..c15cc6795 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,9 @@ language: c
 sudo: required
 dist: trusty
 
+env:
+- CFLAGS=-Werror
+
 os:
   - linux
   - osx