diff --git a/apps/emqx_slow_subs/src/emqx_slow_subs.erl b/apps/emqx_slow_subs/src/emqx_slow_subs.erl
index 1da28d4fa..387d3cb6a 100644
--- a/apps/emqx_slow_subs/src/emqx_slow_subs.erl
+++ b/apps/emqx_slow_subs/src/emqx_slow_subs.erl
@@ -197,7 +197,8 @@ load(State) ->
 
 unload(#{expire_timer := ExpireTimer} = State) ->
     emqx:unhook('delivery.completed', {?MODULE, on_delivery_completed}),
-    State#{expire_timer := cancel_timer(ExpireTimer)}.
+    State#{enable := false,
+           expire_timer := cancel_timer(ExpireTimer)}.
 
 do_clear(Logs) ->
     Now = ?NOW,