diff --git a/src/mod_metrics.erl b/src/mod_metrics.erl
index c175fcb8e..40484e488 100644
--- a/src/mod_metrics.erl
+++ b/src/mod_metrics.erl
@@ -39,7 +39,7 @@
                 s2s_send_packet, s2s_receive_packet,
                 remove_user, register_user]).
 
--export([start/2, stop/1, send_metrics/4, opt_type/1]).
+-export([start/2, stop/1, send_metrics/4, opt_type/1, mod_opt_type/1]).
 
 -export([offline_message_hook/3,
          sm_register_connection_hook/3, sm_remove_connection_hook/3,
@@ -126,3 +126,6 @@ send_metrics(Host, Probe, Peer, Port) ->
 
 opt_type(_) ->
      [].
+
+mod_opt_type(_) ->
+    [].