diff --git a/src/spine.databind.coffee b/src/spine.databind.coffee
index 894d04d..ebf026e 100644
--- a/src/spine.databind.coffee
+++ b/src/spine.databind.coffee
@@ -431,7 +431,8 @@ class Cookie extends Template
 	keys: [ "cookie" ]
 
 	@get: (sKey) ->
-		unescape(document.cookie.replace(new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*"), "$1"))
+		regex = new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*")
+		return unescape(document.cookie.replace(regex, "$1")) if regex.test(document.cookie)
 
 	@set: (sKey, sValue, vEnd, sPath, sDomain, bSecure) ->
 		return if not sKey or /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)
@@ -458,7 +459,7 @@ class Cookie extends Template
 	update: (operators,model,controller,el,options) ->
 		for operator in operators
 			value = @get(model,operator.property)
-			Cookie.set(operator.target,value)
+			Cookie.set(operator.target,value) if value and value isnt "undefined"
 
 	change: (operators,model,controller,el,options) ->
 		for operator in operators
diff --git a/src/spine.databind.js b/src/spine.databind.js
index 0f6cf4a..a015711 100644
--- a/src/spine.databind.js
+++ b/src/spine.databind.js
@@ -755,7 +755,11 @@
     Cookie.prototype.keys = ["cookie"];
 
     Cookie.get = function(sKey) {
-      return unescape(document.cookie.replace(new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*"), "$1"));
+      var regex;
+      regex = new RegExp("(?:^|.*;\\s*)" + escape(sKey).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*");
+      if (regex.test(document.cookie)) {
+        return unescape(document.cookie.replace(regex, "$1"));
+      }
     };
 
     Cookie.set = function(sKey, sValue, vEnd, sPath, sDomain, bSecure) {
@@ -800,7 +804,11 @@
       for (_i = 0, _len = operators.length; _i < _len; _i++) {
         operator = operators[_i];
         value = this.get(model, operator.property);
-        _results.push(Cookie.set(operator.target, value));
+        if (value && value !== "undefined") {
+          _results.push(Cookie.set(operator.target, value));
+        } else {
+          _results.push(void 0);
+        }
       }
       return _results;
     };