diff --git a/pcap/reader.go b/pcap/reader.go
index 7aa2f96..85f6aa3 100644
--- a/pcap/reader.go
+++ b/pcap/reader.go
@@ -1,3 +1,4 @@
+// Package pcap implements reading and writing the "classic" libpcap format.
 package pcap
 
 import (