diff --git a/src/filters/index.js b/src/filters/index.js
index 36cb3e7c..4943cde8 100644
--- a/src/filters/index.js
+++ b/src/filters/index.js
@@ -104,5 +104,8 @@ export function html2Text(val) {
 
 
 export function toThousandslsFilter(num) {
-  return (+num || 0).toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,');
+  return (+num || 0).toString()
+                    .replace(/^\-?\d+/g, function(m){
+                        return m.replace(/(?=(?!\b)(\d{3})+$)/g, ',');
+                        });
 }