diff --git a/lib/hyperscript/parser.sx b/lib/hyperscript/parser.sx
index 4cde77ee..9723d9a3 100644
--- a/lib/hyperscript/parser.sx
+++ b/lib/hyperscript/parser.sx
@@ -137,7 +137,7 @@
                   (when (and (= (tp-type) "op") (= (tp-val) "!")) (adv!))
                   (list (quote beep!) (parse-expr))))
               ((and (= typ "keyword") (= val "not"))
-                (do (adv!) (list (quote not) (parse-expr))))
+                (do (adv!) (list (quote hs-falsy?) (parse-atom))))
               ((and (= typ "keyword") (= val "no"))
                 (do (adv!) (list (quote no) (parse-expr))))
               ((and (= typ "keyword") (= val "eval"))
diff --git a/shared/static/wasm/sx/hs-parser.sx b/shared/static/wasm/sx/hs-parser.sx
index 4cde77ee..9723d9a3 100644
--- a/shared/static/wasm/sx/hs-parser.sx
+++ b/shared/static/wasm/sx/hs-parser.sx
@@ -137,7 +137,7 @@
                   (when (and (= (tp-type) "op") (= (tp-val) "!")) (adv!))
                   (list (quote beep!) (parse-expr))))
               ((and (= typ "keyword") (= val "not"))
-                (do (adv!) (list (quote not) (parse-expr))))
+                (do (adv!) (list (quote hs-falsy?) (parse-atom))))
               ((and (= typ "keyword") (= val "no"))
                 (do (adv!) (list (quote no) (parse-expr))))
               ((and (= typ "keyword") (= val "eval"))