diff --git a/scapy/scapypipes.py b/scapy/scapypipes.py
index 29b370bc67ae712b4ee542f304275578d2b84604..94bd401abc990ec2c6a2f5be1e5af14af30f5547 100644
--- a/scapy/scapypipes.py
+++ b/scapy/scapypipes.py
@@ -101,7 +101,7 @@ class WrpcapSink(Sink):
         
 
 class UDPDrain(Drain):
-    """Apply a function to messages on low and high entry
+    """UDP payloads received on high entry are sent over UDP
      +-------------+
   >>-|--[payload]--|->>
      |      X      |