diff --git a/.travis.yml b/.travis.yml
index 486feb1274..32977b185c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ script:
   - cd csources
   - sh build.sh
   - cd ..
+  - sed -i -e 's,cc = gcc,cc = clang,' config/nim.cfg
   - ./bin/nim c koch
   - ./koch boot
   - ./koch boot -d:release