diff --git a/paper-datatable-column.html b/paper-datatable-column.html
index 656c694..66a7829 100644
--- a/paper-datatable-column.html
+++ b/paper-datatable-column.html
@@ -334,7 +334,7 @@
 				},
 
 				_cast: function(value){
-					if(typeof value === 'undefined'){
+					if(typeof value === 'undefined' || value === null){
 						if(typeof this.default !== 'undefined'){
 							value = JSON.parse(JSON.stringify(this.default));
 						}else{