diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index 9f2dda2b87e49d5325a092bb638eb2632039353f..00c25b9c12ce1991440a7ac554bf7992f49bc274 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -1554,6 +1554,7 @@ static int dahdi_devicestate(const char *data);
 static int dahdi_cc_callback(struct ast_channel *inbound, const char *dest, ast_cc_callback_fn callback);
 
 /* BUGBUG The DAHDI channel driver needs its own native bridge technology. */
+/* BUGBUG The transfer=yes option is broken for ISDN to push tromboned calls to the peer. */
 static struct ast_channel_tech dahdi_tech = {
 	.type = "DAHDI",
 	.description = tdesc,