diff --git a/.travis.yml b/.travis.yml
index f773b18..a362b03 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -69,7 +69,7 @@ matrix:
 
 before_install:
   - |
-      if [ "$TRAVIS_OS_NAME" = "osx" ]; then
+      if [ "$TRAVIS_OS_NAME" = "osx" ] && [ "$CC" = "clang" ]; then
         brew update;
         brew install llvm --with-clang --with-asan --HEAD
       fi