diff --git a/.travis.yml b/.travis.yml
index c8bbb6d8..46f58766 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,5 +22,5 @@ install: true
 script:
     - ./autogen.sh --with-proxy --with-bot --with-perl=module --prefix=$HOME/irssi-build
     - cat config.log
-    - make
+    - make CFLAGS="-Wall -Werror"
     - make install