diff --git a/rebar.config b/rebar.config
index ae5fa8e99..28837b3f7 100644
--- a/rebar.config
+++ b/rebar.config
@@ -18,6 +18,10 @@
 
 {validate_app_modules, true}.
 
+{erl_first_files, ["src/gen_server2.erl",
+                   "src/emqttd_auth_mod.erl",
+                   "src/emqttd_acl_mod.erl"]}.
+
 %% plugins cannot find emqttd.hrl without ".." lib dirs:(
 %% but this setting will make deps apps collision
 %% comment in 0.13.0 release