diff --git a/std/assembly/index.d.ts b/std/assembly/index.d.ts
index 5bb689f80f..e24d742684 100644
--- a/std/assembly/index.d.ts
+++ b/std/assembly/index.d.ts
@@ -1425,7 +1425,7 @@ declare const F32: typeof _Float;
 declare const F64: typeof _Float;
 /** Alias of F64. */
 declare const Number: typeof F64;
-declare type Number = typeof F64;
+declare type Number = _Float;
 
 // User-defined diagnostic macros