diff --git a/host/lib/simtrace2_api.c b/host/lib/simtrace2_api.c
index c3c61a4d..eeacb36b 100644
--- a/host/lib/simtrace2_api.c
+++ b/host/lib/simtrace2_api.c
@@ -163,7 +163,7 @@ int osmo_st2_generic_request_board_info(struct osmo_st2_slot *slot)
 {
 	struct msgb *msg = st_msgb_alloc();
 
-	return osmo_st2_slot_tx_msg(0, msg, SIMTRACE_MSGC_GENERIC, SIMTRACE_CMD_BD_BOARD_INFO);
+	return osmo_st2_slot_tx_msg(slot, msg, SIMTRACE_MSGC_GENERIC, SIMTRACE_CMD_BD_BOARD_INFO);
 }