Index: abi/include/abi/ipc/interfaces.h
===================================================================
--- abi/include/abi/ipc/interfaces.h	(revision 7429ffdf6eac3b5f559eb3550dcbe08ba056bb34)
+++ abi/include/abi/ipc/interfaces.h	(revision 1edd6d0c4201fd549dcce1ac7154c0ee7d6ab4c9)
@@ -181,5 +181,7 @@
 	    FOURCC_COMPACT('v', 'o', 'l', ' ') | IFACE_EXCHANGE_SERIALIZE,
 	INTERFACE_VBD =
-	    FOURCC_COMPACT('v', 'b', 'd', ' ') | IFACE_EXCHANGE_SERIALIZE
+	    FOURCC_COMPACT('v', 'b', 'd', ' ') | IFACE_EXCHANGE_SERIALIZE,
+	INTERFACE_IPC_TEST =
+	    FOURCC_COMPACT('i', 'p', 'c', 't') | IFACE_EXCHANGE_SERIALIZE
 } iface_t;