diff --git a/js/Set.js b/js/Set.js
index 469b679..2a30e9d 100644
--- a/js/Set.js
+++ b/js/Set.js
@@ -1,12 +1,10 @@
+import id from UnitJS.Fun;
+
 return {
 	make: make,
 	Int: make({toKey: id, ofKey: parseInt})
 };
 
-function id(x) {
-	return x;
-}
-
 function make(type) {
 	type = type ?? {toKey: id, ofKey: id};