diff --git a/src/shapes/arc.js b/src/shapes/arc.js
index 39cf624..2aef268 100644
--- a/src/shapes/arc.js
+++ b/src/shapes/arc.js
@@ -2,9 +2,8 @@
 
 import { display } from '../display';
 import { DefineScale } from '../data/define';
-import type {OMG} from '../core';
 
-export default function(settings: Object, _this: OMG): GraghShape {
+export default function(settings: Object, _this: Global): GraghShape {
   const draw = function() {
     const canvas = _this.canvas;
     const scale = _this.scale;