diff --git a/src/runtime/motion/utils.ts b/src/runtime/motion/utils.ts
index 2eab8baa2f..c334117348 100644
--- a/src/runtime/motion/utils.ts
+++ b/src/runtime/motion/utils.ts
@@ -1,3 +1,10 @@
-export function is_date(obj: any): obj is Date {
-	return Object.prototype.toString.call(obj) === '[object Date]';
+/** @param {any} obj
+ * @returns {boolean}
+ */
+export function is_date(obj) {
+    return Object.prototype.toString.call(obj) === '[object Date]';
 }
+
+
+
+