diff --git a/README.md b/README.md
index 0571f66..4fb0ba1 100644
--- a/README.md
+++ b/README.md
@@ -135,6 +135,7 @@ var istanbul = require('gulp-istanbul');
 
 gulp.src('lib/**.js')
   .pipe(istanbul({
+    // supports es6
     instrumenter: isparta.Instrumenter
   }));
 ```