diff --git a/README.md b/README.md
index 862eb50..0168fea 100644
--- a/README.md
+++ b/README.md
@@ -113,3 +113,5 @@ public byte[] provide() {
 # Receiving audio
 
 Refer to the `setVoiceHandler` and `setWhisperHandler` methods to supply a Consumer object to receive Voice and Whisper packets.  You will need to decode the packets yourself, and insert packet-loss-correction as needed.
+
+Note that the first 5 packets starting a voice session are marked with the COMPRESSED flag.  The final voice packet, intended to singal to close your decoder and flush samples, is always empty (0-length byte array).