diff --git a/src/emqttd_pubsub.erl b/src/emqttd_pubsub.erl
index 1af6274bf..487181a0e 100644
--- a/src/emqttd_pubsub.erl
+++ b/src/emqttd_pubsub.erl
@@ -26,7 +26,7 @@
 -export([start_link/3, subscribe/2, unsubscribe/2, publish/2,
          async_subscribe/2, async_unsubscribe/2]).
 
--export([subscribers/1]).
+-export([subscribers/1, dispatch/2]).
 
 %% gen_server.
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
diff --git a/src/emqttd_router.erl b/src/emqttd_router.erl
index a58e599e0..bcbbb42e8 100644
--- a/src/emqttd_router.erl
+++ b/src/emqttd_router.erl
@@ -64,7 +64,7 @@ mnesia(boot) ->
                 {attributes, record_info(fields, mqtt_route)}]);
 
 mnesia(copy) ->
-    ok = emqttd_mnesia:copy_table(topic),
+    ok = emqttd_mnesia:copy_table(mqtt_topic),
     ok = emqttd_mnesia:copy_table(mqtt_route, ram_copies).
 
 %%--------------------------------------------------------------------