diff --git a/.travis.yml b/.travis.yml
index 193e500..0e8467d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ addons:
   apt:
     packages:
       - g++-multilib
+      - libc6-dev:i386
 compiler:
   - clang
 before_script: