diff --git a/build.js b/build.js
index 2da02386..75b7b5ae 100644
--- a/build.js
+++ b/build.js
@@ -169,7 +169,7 @@ var filesToInclude = [
 
   ifSpecifiedInclude('interaction', 'src/canvas.class.js'),
   ifSpecifiedInclude('interaction', 'src/mixins/canvas_events.mixin.js'),
-  ifSpecifiedInclude('interaction', 'src/mixins/canvas_wheel_event.mixin.js')
+  ifSpecifiedInclude('interaction', 'src/mixins/canvas_wheel_event.mixin.js'),
 
   'src/mixins/canvas_dataurl_exporter.mixin.js',