diff --git a/src/index.ts b/src/index.ts
index c0914276a..ddc73df1c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -37,14 +37,16 @@ export async function auth(
   environment: 'local' | 'dev' | 'production',
   appVersion?: string | undefined,
   hasCreateIdentityCallback?: boolean | undefined,
-  hasEnableIdentityCallback?: boolean | undefined
+  hasEnableIdentityCallback?: boolean | undefined,
+  enableAlphaMls?: boolean | undefined
 ) {
   return await XMTPModule.auth(
     address,
     environment,
     appVersion,
     hasCreateIdentityCallback,
-    hasEnableIdentityCallback
+    hasEnableIdentityCallback,
+    enableAlphaMls
   )
 }
 
diff --git a/src/lib/Client.ts b/src/lib/Client.ts
index 8bba98221..207ec2646 100644
--- a/src/lib/Client.ts
+++ b/src/lib/Client.ts
@@ -111,7 +111,8 @@ export class Client<ContentTypes> {
           options.env,
           options.appVersion,
           Boolean(createSubscription),
-          Boolean(enableSubscription)
+          Boolean(enableSubscription),
+          Boolean(options.enableAlphaMls)
         )
       })()
     })