diff --git a/.travis.yml b/.travis.yml
index d789f15a738..f1bdac7a3f6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,8 +17,8 @@ env:
   - secure: "YnhS+8n6B+uoyaYfaJ3Lei7cSJqHDPiKJCKFIF2c87YDfmCvAJke8QtE7IzjYDs7UFkTCM4ox+ph2bERUrxZbSCyEkHdjIZpKuMJfYWja/jgMqTMxdyOH9y8JLFbZsSXDIXDwqBlC6vVyl1fP90M35wuWcNTs6tctfVWVofEFbs="
   - GITTEST_INVASIVE_FS_SIZE=1
  matrix:
-  - OPTIONS="-DTHREADSAFE=ON -DCMAKE_BUILD_TYPE=Release"
-  - OPTIONS="-DTHREADSAFE=OFF -DBUILD_EXAMPLES=ON"
+  - OPTIONS="-DTHREADSAFE=ON -DCMAKE_BUILD_TYPE=Release -DENABLE_WERROR=ON"
+  - OPTIONS="-DTHREADSAFE=OFF -DBUILD_EXAMPLES=ON -DENABLE_WERROR=ON"
 
 addons:
   apt: