diff --git a/.travis.yml b/.travis.yml
index df89593c4ab62be3b9bd89c2d83162491bf58eee..c15cc67954cf5a463b1aacdc17e56c9fa0c4998f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,9 @@ language: c
 sudo: required
 dist: trusty
 
+env:
+- CFLAGS=-Werror
+
 os:
   - linux
   - osx