diff --git a/lib/bson/regexp.js b/lib/bson/regexp.js
index c364075d..6429ba66 100644
--- a/lib/bson/regexp.js
+++ b/lib/bson/regexp.js
@@ -14,7 +14,7 @@ function alphabetize(str) {
  * @return {BSONRegExp} A MinKey instance
  */
 function BSONRegExp(pattern, options) {
-  if (!(this instanceof BSONRegExp)) return new BSONRegExp();
+  if (!(this instanceof BSONRegExp)) return new BSONRegExp(pattern, options);
 
   // Execute
   this._bsontype = 'BSONRegExp';