diff --git a/apps/emqx_machine/src/emqx_machine_schema.erl b/apps/emqx_machine/src/emqx_machine_schema.erl
index bf695bb19..f0de9d443 100644
--- a/apps/emqx_machine/src/emqx_machine_schema.erl
+++ b/apps/emqx_machine/src/emqx_machine_schema.erl
@@ -54,6 +54,7 @@
         , emqx_dashboard_schema
         , emqx_gateway_schema
         , emqx_prometheus_schema
+        , emqx_exhook_schema
         ]).
 
 %% TODO: add a test case to ensure the list elements are unique