diff --git a/lib/assert.js b/lib/assert.js
index 8b6b49ae43ba41..11fef455ab7dc5 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -42,7 +42,7 @@ assert.AssertionError = function AssertionError(options) {
   this.actual = options.actual;
   this.expected = options.expected;
   this.operator = options.operator;
-  this.message = options.message || getMessage(this)
+  this.message = options.message || getMessage(this);
   var stackStartFunction = options.stackStartFunction || fail;
   Error.captureStackTrace(this, stackStartFunction);
 };