diff --git a/api/client-server/v2_alpha/sync.yaml b/api/client-server/v2_alpha/sync.yaml
index c857d272..5018080e 100644
--- a/api/client-server/v2_alpha/sync.yaml
+++ b/api/client-server/v2_alpha/sync.yaml
@@ -38,6 +38,11 @@ paths:
           type: string
           description: |-
             A point in time to continue a sync from.
+        - in: query
+          name: set_presence
+          type: string
+          description: |-
+            Set the presence status of this client.
         - in: query
           name: timeout
           type: integer