Index: abi/include/abi/ipc/interfaces.h
===================================================================
--- abi/include/abi/ipc/interfaces.h	(revision 40eab9fdcc5233a31ae07d23360a0b5fc2e5c701)
+++ abi/include/abi/ipc/interfaces.h	(revision d92b8e8f16d19c0ce7828d8dfbc2f178747ce076)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2023 Jiri Svoboda
+ * Copyright (c) 2024 Jiri Svoboda
  * Copyright (c) 2014 Martin Decky
  * All rights reserved.
@@ -201,4 +201,6 @@
 	INTERFACE_WNDMGT_CB =
 	    FOURCC_COMPACT('w', 'm', 'g', 't') | IFACE_EXCHANGE_SERIALIZE | IFACE_MOD_CALLBACK,
+	INTERFACE_TBARCFG_NOTIFY =
+	    FOURCC_COMPACT('t', 'b', 'c', 'f') | IFACE_EXCHANGE_SERIALIZE
 } iface_t;