diff --git a/ts/textsecure/WebAPI.ts b/ts/textsecure/WebAPI.ts
index ea371f4e49..3863c62362 100644
--- a/ts/textsecure/WebAPI.ts
+++ b/ts/textsecure/WebAPI.ts
@@ -1799,9 +1799,7 @@ export function initialize({
         urlParameters: `?ts=${timestamp}&online=${online ? 'true' : 'false'}`,
         responseType: 'json',
         unauthenticated: true,
-        headers: {
-          'Unidentified-Access-Key': arrayBufferToBase64(accessKeys),
-        },
+        accessKey: arrayBufferToBase64(accessKeys),
       });
     }