diff --git a/jack/messagebuffer.h b/jack/messagebuffer.h
index f499382..18b8027 100644
--- a/jack/messagebuffer.h
+++ b/jack/messagebuffer.h
@@ -39,4 +39,6 @@ void jack_message_buffer_thread_init (void (*cb)(void*), void*);
 
 void jack_messagebuffer_add(const char *fmt, ...);
 
+void jack_messagebuffer_thread_init (void (*cb)(void*), void* arg);
+
 #endif /* __jack_messagebuffer_h__ */