Index: abi/include/abi/ipc/interfaces.h
===================================================================
--- abi/include/abi/ipc/interfaces.h	(revision 78bb04b92e09ae2a1fde3ea5b10390585614d400)
+++ abi/include/abi/ipc/interfaces.h	(revision 0dd16778197e5f50b6e77a71d9b8aeb33b2ad863)
@@ -81,4 +81,6 @@
 	INTERFACE_LOADER =
 	    FOURCC_COMPACT('l', 'o', 'a', 'd') | IFACE_EXCHANGE_PARALLEL,
+	INTERFACE_DDF_CLIENT =
+	    FOURCC_COMPACT('d', 'd', 'f', 'c') | IFACE_EXCHANGE_SERIALIZE,
 	INTERFACE_TCP_CB =
 	    FOURCC_COMPACT('t', 'c', 'p', ' ') | IFACE_EXCHANGE_SERIALIZE | IFACE_MOD_CALLBACK,