diff --git a/src/emqx_banned.erl b/src/emqx_banned.erl
index 1ca0ecf8f..80f93be70 100644
--- a/src/emqx_banned.erl
+++ b/src/emqx_banned.erl
@@ -85,7 +85,7 @@ do_check(Who) when is_tuple(Who) ->
     case mnesia:dirty_read(?BANNED_TAB, Who) of
         [] -> false;
         [#banned{until = Until}] ->
-            Until > erlang:system_time(millisecond)
+            Until > erlang:system_time(second)
     end.
 
 -spec(create(emqx_types:banned()) -> ok).