diff --git a/lib/js/runtime.sx b/lib/js/runtime.sx
index 066a5506..23e0f826 100644
--- a/lib/js/runtime.sx
+++ b/lib/js/runtime.sx
@@ -1260,10 +1260,6 @@
 
 (define isNaN js-global-is-nan)
 
-(define Infinity inf)
-
-(define NaN 0)
-
 (define __js_microtask_queue__ (dict))
 
 (dict-set! __js_microtask_queue__ "q" (list))