diff --git a/.travis.yml b/.travis.yml
index a97e25240a..cbc5b63bff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ services:
 install:
   - sh -c "if [ '$DB' = 'mariadb' ]; then travis/setup-mariadb.sh; fi"
   - sh -c "if [ `php -r "echo (int) version_compare(PHP_VERSION, '5.3.19', '>=');"` = "1" ]; then travis/setup-webserver.sh; fi"
-  - travis/setup-php-extensions.sh
+  - sh -c "if [ '$TRAVIS_PHP_VERSION' != 'hhvm' ]; then travis/setup-php-extensions.sh; fi"
   - cd phpBB
   - php ../composer.phar install --dev --no-interaction --prefer-source
   - cd ..