diff --git a/rebar.config b/rebar.config
index a217dee93..d3379afb6 100644
--- a/rebar.config
+++ b/rebar.config
@@ -68,7 +68,7 @@
                   ezlib,
                   iconv]}}.
 
-{erl_first_files, ["src/ejabberd_config.erl"]}.
+{erl_first_files, ["src/ejabberd_config.erl", "src/gen_mod.erl"]}.
 
 {erl_opts, [nowarn_deprecated_function,
             {if_var_false, debug, no_debug_info},