diff --git a/deps/rabbit/src/rabbit_backing_queue.erl b/deps/rabbit/src/rabbit_backing_queue.erl
index 931830aaeb62..5bae9eef6067 100644
--- a/deps/rabbit/src/rabbit_backing_queue.erl
+++ b/deps/rabbit/src/rabbit_backing_queue.erl
@@ -105,7 +105,7 @@
 
 %% Called to inform the BQ about messages which have reached the
 %% queue, but are not going to be further passed to BQ.
--callback discard(rabbit_types:basic_message(), pid(), state()) -> state().
+-callback discard(mc:state(), pid(), state()) -> state().
 
 %% Return ids of messages which have been confirmed since the last
 %% invocation of this function (or initialisation).