diff --git a/hbd b/hbd
index 125d500..a62088b 100755
--- a/hbd
+++ b/hbd
@@ -386,7 +386,10 @@ def fromaddr(name, addr, boot, interval, acks):
 def readsock():
 	global htab, win
 	data, addr = sock.recvfrom(1024)
-	sock.sendto("ACK", addr)
+	try:
+		sock.sendto("ACK", addr)
+	except:
+		pass
 	pairs = string.split(data, ';')
 	boot = 0
 	shutdown = 0