diff --git a/plugin/series/Rect.js b/plugin/series/Rect.js
index 104d998..b85135c 100644
--- a/plugin/series/Rect.js
+++ b/plugin/series/Rect.js
@@ -11,7 +11,7 @@ module.exports = {
                 // color = '',
                 bgColor = '',
                 radius = 0,
-                lineStyle
+                lineStyle = {}
                 // blur = 0
             } = config