1 files changed, 2 insertions, 0 deletions
diff --git a/lib/buffer.js b/lib/buffer.js
index 2e29ae4eba..f14783d626 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -19,6 +19,8 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+'use strict';
+
 var buffer = process.binding('buffer');
 var smalloc = process.binding('smalloc');
 var util = require('util');