diff --git a/.travis.yml b/.travis.yml
index 69ba417..beb7776 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ install:
   - tests/unit/data/travis/cubrid-setup.sh
   - tests/unit/data/travis/sphinx-setup.sh
   - echo "extension = mongo.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - sudo echo "textSearchEnabled=true" >> /etc/mongodb.conf
+  - sudo 'echo "textSearchEnabled=true" >> /etc/mongodb.conf'
   - sudo service restart mongodb
 
 before_script: