diff --git a/.travis.yml b/.travis.yml
index 8b23610ece..f08f1f5e69 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: cpp
 compiler:
   - gcc
   - clang
+os: linux
 dist: bionic
 cache: ccache
 
@@ -18,13 +19,16 @@ addons:
     - gcc-8
     - g++-8
 
+env:
+   - CMAKEVARS="-DCMAKE_C_FLAGS=-m32 -DCMAKE_CXX_FLAGS=-m32"
+   - CMAKEVARS=""
+
 install:
 - if [ "$CXX" = "g++" ]; then export CXX="g++-8" CC="gcc-8"; fi
 
 before_script:
-# optional dependencies
   - git submodule update --init --recursive
-  - cmake -DSPRINGLOBBY_UPDATER:BOOL=ON -DCMAKE_INSTALL_PREFIX:PATH=/tmp .
+  - cmake -DSPRINGLOBBY_UPDATER:BOOL=ON -DCMAKE_INSTALL_PREFIX:PATH=/tmp $CMAKE_VARS .
 script:
   - make -j2 -k
   - make -k check