1 files changed, 4 insertions, 2 deletions
diff --git a/lib/_tls_legacy.js b/lib/_tls_legacy.js
index 3f6d20784b..70082a4156 100644
--- a/lib/_tls_legacy.js
+++ b/lib/_tls_legacy.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 assert = require('assert');
 var events = require('events');
 var stream = require('stream');
@@ -444,9 +446,9 @@ CryptoStream.prototype.destroySoon = function(err) {
     // was written on this side was read from the other side.
     var self = this;
     var waiting = 1;
-    function finish() {
+    var finish = function() {
       if (--waiting === 0) self.destroy();
-    }
+    };
     this._opposite.once('end', finish);
     if (!this._finished) {
       this.once('finish', finish);