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-rw-r--r--lib/_tls_common.js2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/_tls_common.js b/lib/_tls_common.js
index 01efcebc14..e66ae662fe 100644
--- a/lib/_tls_common.js
+++ b/lib/_tls_common.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 util = require('util');
var constants = require('constants');
var tls = require('tls');