ustream: make notify_state optional as well

1 files changed, 1 insertions, 1 deletions

diff --git a/ustream.h b/ustream.h
index 634a3e7..2df429c 100644
--- a/ustream.h
+++ b/ustream.h
@@ -68,7 +68,7 @@ struct ustream {
 	void (*notify_write)(struct ustream *s, int bytes);
 
 	/*
-	 * notify_state:
+	 * notify_state: (optional)
 	 * called by the ustream implementation to notify that the read
 	 * side of the stream is closed (eof is set) or there was a write
 	 * error (write_error is set).