diff --git a/lib/js/runtime.sx b/lib/js/runtime.sx
index 4da7e64d..3d2bb68d 100644
--- a/lib/js/runtime.sx
+++ b/lib/js/runtime.sx
@@ -19,7 +19,7 @@
 
 ;; ── Type predicates ───────────────────────────────────────────────
 
-(define js-max-value-approx (fn () (js-max-value-loop 1 1000)))
+(define js-max-value-approx (fn () (js-max-value-loop 1 2000)))
 
 ;; ── Boolean coercion (ToBoolean) ──────────────────────────────────
 
@@ -372,7 +372,7 @@
             ((not (js-undefined? m)) (js-call-with-this recv m args))
             ((and (js-function? recv) (js-function-method? key))
               (js-invoke-function-method recv key args))
-            ((and (js-function? recv) (js-object-builtin-method? key))
+            ((and (js-function? recv) (not (= (type-of recv) "dict")) (js-object-builtin-method? key))
               (js-invoke-function-objproto recv key args))
             ((and (= (type-of recv) "dict") (js-object-builtin-method? key))
               (js-invoke-object-method recv key args))