1 files changed, 4 insertions, 4 deletions
diff --git a/lib/date.js b/lib/date.js
index 46e3b550..081ddab5 100644
--- a/lib/date.js
+++ b/lib/date.js
@@ -13,7 +13,7 @@ var _Date = function (faker) {
    */
   self.past = function (years, refDate) {
       var date = new Date();
-      if (refDate !== undefined) {
+      if (typeof refDate !== "undefined") {
           date = new Date(Date.parse(refDate));
       }
 
@@ -38,7 +38,7 @@ var _Date = function (faker) {
    */
   self.future = function (years, refDate) {
       var date = new Date();
-      if (refDate !== undefined) {
+      if (typeof refDate !== "undefined") {
           date = new Date(Date.parse(refDate));
       }
 
@@ -79,7 +79,7 @@ var _Date = function (faker) {
    */
   self.recent = function (days, refDate) {
       var date = new Date();
-      if (refDate !== undefined) {
+      if (typeof refDate !== "undefined") {
           date = new Date(Date.parse(refDate));
       }
 
@@ -104,7 +104,7 @@ var _Date = function (faker) {
    */
   self.soon = function (days, refDate) {
       var date = new Date();
-      if (refDate !== undefined) {
+      if (typeof refDate !== "undefined") {
           date = new Date(Date.parse(refDate));
       }