diff --git a/libmctp.h b/libmctp.h
index 46bda90..09672ac 100644
--- a/libmctp.h
+++ b/libmctp.h
@@ -67,6 +67,8 @@
 
 struct mctp *mctp_init(void);
 void mctp_set_max_message_size(struct mctp *mctp, size_t message_size);
+typedef void (*mctp_capture_fn)(struct mctp_pktbuf *pkt, void *user);
+void mctp_set_capture_handler(struct mctp *mctp, mctp_capture_fn fn, void *user);
 void mctp_destroy(struct mctp *mctp);
 
 /* Register a binding to the MCTP core, and creates a bus (populating