diff --git a/src/clj/com/rpl/specter/impl.clj b/src/clj/com/rpl/specter/impl.clj
index 6d8e7a3..62d649b 100644
--- a/src/clj/com/rpl/specter/impl.clj
+++ b/src/clj/com/rpl/specter/impl.clj
@@ -145,7 +145,7 @@
     (let [empty-structure (empty structure)
           pfn (partial next-fn vals)]
       (if (list? empty-structure)
-        (map pfn structure)
+        (doall (map pfn structure))
         (->> structure (r/map pfn) (into empty-structure))
         ))))