diff --git a/src/emqttd_guid.erl b/src/emqttd_guid.erl
index ca2a85093..c50294c65 100644
--- a/src/emqttd_guid.erl
+++ b/src/emqttd_guid.erl
@@ -35,10 +35,6 @@
 
 -type guid() :: <<_:128>>.
 
--ifdef(TEST).
--compile(export_all).
--endif.
-
 %% @doc Generate a global unique id.
 -spec gen() -> guid().
 gen() ->