diff --git a/.travis.yml b/.travis.yml
index b179fdf..ec94be1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,11 @@ matrix:
       env: R_CODECOV=true
     - os: osx
       osx_image: xcode8.3
+before_install:
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install llvm &&
+    export PATH="/usr/local/opt/llvm/bin:$PATH" &&
+    export LDFLAGS="-L/usr/local/opt/llvm/lib" &&
+    export CFLAGS="-I/usr/local/opt/llvm/include"; fi
 r_packages:
 - covr
 after_success: