diff --git a/src/client.ts b/src/client.ts
index 99bb60e4a..09118d58c 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -175,7 +175,7 @@ export default class Client extends API {
       caFingerprint: null,
       agent: null,
       headers: {
-        'user-agent': `elasticsearch-js/${clientVersion} Node.js ${nodeVersion}; Transport ${transportVersion}; (${os.platform()} ${os.release()} ${os.arch()})`
+        'user-agent': `elasticsearch-js/${clientVersion} (${os.platform()} ${os.release()}-${os.arch()}; Node.js ${nodeVersion}; Transport ${transportVersion})`
       },
       nodeFilter: null,
       generateRequestId: null,