diff --git a/include/drm/drm_dp_mst_helper.h b/include/drm/drm_dp_mst_helper.h
index 7f78d26a076694ce5dcd42fe99da555fe092daa1..0f7439f0bb2f7c0f8c282cdebe01378b0cf33e1f 100644
--- a/include/drm/drm_dp_mst_helper.h
+++ b/include/drm/drm_dp_mst_helper.h
@@ -313,7 +313,7 @@ struct drm_dp_resource_status_notify {
 
 struct drm_dp_query_payload_ack_reply {
 	u8 port_number;
-	u8 allocated_pbn;
+	u16 allocated_pbn;
 };
 
 struct drm_dp_sideband_msg_req_body {