diff --git a/src/rawmidi/rawmidi.c b/src/rawmidi/rawmidi.c
index 792b73fe..73ad293e 100644
--- a/src/rawmidi/rawmidi.c
+++ b/src/rawmidi/rawmidi.c
@@ -62,6 +62,9 @@ Using #SND_RAWMIDI_APPEND flag (output only) instruct device driver to append
 contents of written buffer - passed by snd_rawmidi_write() - atomically
 to output ring buffer in the kernel space. This flag also means that device
 is not opened exclusively, so more applications can share given rawmidi device.
+Note that applications must send the whole MIDI message including the running status,
+because another writting application might break the MIDI message in the output
+buffer.
 
 \subsection rawmidi_open_sync Sync open (flag)