diff --git a/samples/crud.js b/samples/crud.js
index 35a2858c3..41af3ecab 100644
--- a/samples/crud.js
+++ b/samples/crud.js
@@ -309,8 +309,8 @@ async function readStaleData(instanceId, databaseId, projectId) {
   };
 
   const options = {
-    // Guarantees that all writes committed more than 15 seconds ago are visible
-    exactStaleness: 15,
+    // Guarantees that all writes committed more than 15000 milliseconds ago are visible
+    exactStaleness: 15000,
   };
 
   try {