Index: abi/include/abi/ipc/interfaces.h
===================================================================
--- abi/include/abi/ipc/interfaces.h	(revision ee3b28a97324351b0acfb1161a2ed94632eab95c)
+++ abi/include/abi/ipc/interfaces.h	(revision b0f13664307c5f49642065cfc42aec7d4a3040cb)
@@ -202,5 +202,7 @@
 	    FOURCC_COMPACT('w', 'm', 'g', 't') | IFACE_EXCHANGE_SERIALIZE | IFACE_MOD_CALLBACK,
 	INTERFACE_TBARCFG_NOTIFY =
-	    FOURCC_COMPACT('t', 'b', 'c', 'f') | IFACE_EXCHANGE_SERIALIZE
+	    FOURCC_COMPACT('t', 'b', 'c', 'f') | IFACE_EXCHANGE_SERIALIZE,
+	INTERFACE_HR =
+	    FOURCC_COMPACT('h', 'r', ' ', ' ') | IFACE_EXCHANGE_SERIALIZE
 } iface_t;