diff --git a/apps/emqx_authz/src/emqx_authz.erl b/apps/emqx_authz/src/emqx_authz.erl
index 40c987e1f..5d8f5f79f 100644
--- a/apps/emqx_authz/src/emqx_authz.erl
+++ b/apps/emqx_authz/src/emqx_authz.erl
@@ -389,7 +389,7 @@ maybe_write_files(NewSource) ->
 
 write_acl_file(#{<<"rules">> := Rules} = Source) ->
     NRules = check_acl_file_rules(Rules),
-    Path = acl_conf_file(),
+    Path = ?MODULE:acl_conf_file(),
     {ok, _Filename} = write_file(Path, NRules),
     maps:without([<<"rules">>], Source#{<<"path">> => Path}).