diff --git a/library/compiler-builtins/.travis.yml b/library/compiler-builtins/.travis.yml
index dee71f7022f3..6d3d4311a40c 100644
--- a/library/compiler-builtins/.travis.yml
+++ b/library/compiler-builtins/.travis.yml
@@ -62,7 +62,8 @@ matrix:
             - qemu-user-static
     - env: TARGET=powerpc64le-unknown-linux-gnu
       os: linux
-      services: docker
+      services:
+        - docker
       sudo: required
     - env: TARGET=x86_64-apple-darwin
       os: osx