diff --git a/index.js b/index.js
index ce972329..3d649f87 100644
--- a/index.js
+++ b/index.js
@@ -471,7 +471,7 @@
   //. > S.map(S.concat(S.__, '?'), ['foo', 'bar', 'baz'])
   //. ['foo?', 'bar?', 'baz?']
   //. ```
-  S.__ = {'@@functional/placeholder': true};
+  S.__ = $.__;
 
   //. ### Classify