diff --git a/src/js/bootstrap-datetimepicker.js b/src/js/bootstrap-datetimepicker.js
index c566f890e..c3f5329b8 100644
--- a/src/js/bootstrap-datetimepicker.js
+++ b/src/js/bootstrap-datetimepicker.js
@@ -181,7 +181,7 @@
     },
 
     setValue: function(newDate) {
-      if (!newDate) {
+      if (newDate===null || newDate===undefined) {
         this._unset = true;
       } else {
         this._unset = false;