diff --git a/docs/integrations/persisting-store-data.md b/docs/integrations/persisting-store-data.md
index 5040baf2..5656c986 100644
--- a/docs/integrations/persisting-store-data.md
+++ b/docs/integrations/persisting-store-data.md
@@ -462,9 +462,10 @@ const storage = createJSONStorage(() => sessionStorage, {
     return value
   },
   replacer: (key, value) => {
-    if (value instanceof Date) {
-      return { type: 'date', value: value.toISOString() }
-    }
+    // NOTE: the result of `.toJSON()` is passed to the
+    // replacer function as value if is available so
+    // a Date is always a `string` at this point
+    if (key === 'someDate') return { type: 'date', value }
     return value
   },
 })