Index: uspace/lib/hound/include/hound/protocol.h
===================================================================
--- uspace/lib/hound/include/hound/protocol.h	(revision 39c4d1fcc4ef3db6fd729c7933a9c29213dab92d)
+++ uspace/lib/hound/include/hound/protocol.h	(revision 60e5696d7203fade9af5cc9727a0546015a01269)
@@ -102,4 +102,5 @@
 	    void **);
 	int (*rem_stream)(void *, void *);
+	int (*drain_stream)(void *);
 	int (*stream_data_write)(void *, const void *, size_t);
 	int (*stream_data_read)(void *, void *, size_t);