diff --git a/src/parse.ts b/src/parse.ts
index d0055c7..3b64076 100644
--- a/src/parse.ts
+++ b/src/parse.ts
@@ -1,3 +1,4 @@
 export function parse(x: unknown): number {
-  return Number(x);
+  // @ts-ignore legacy input shape
+  return Number(x.value);
 }