diff --git a/lib/textParser.js b/lib/textParser.js
index c42aa091..7c4e6a48 100644
--- a/lib/textParser.js
+++ b/lib/textParser.js
@@ -35,7 +35,7 @@ p.parseDate = function(value) {
         mili = 1000 * this.parseFloat(miliString);
     }
 
-    var tZone = /([Z|+\-])(\d{2})?(\d{2})?/.exec(isoDate.split(' ')[1]);
+    var tZone = /([Z|+\-])(\d{2})?(\d{2})?/.exec(value.split(' ')[1]);
     //minutes to adjust for timezone
     var tzAdjust = 0;