diff --git a/lib/runner.js b/lib/runner.js
index 97f1add..a2a440b 100644
--- a/lib/runner.js
+++ b/lib/runner.js
@@ -180,7 +180,10 @@ function doBundle(browserifyInstance, opts, bundleComplete) {
     else {
       bundleComplete(err, buf);
     }
-  });
+  })
+  // Need this to ensure it works on MacOS
+  // See 'important' note here: https://github.com/substack/watchify#var-w--watchifyb-opts
+  .on('data', function() {});
 }
 
 function testForGlob(id) {