diff --git a/mtab/mtab.go b/mtab/mtab.go
index 4c48be1..e1651ed 100644
--- a/mtab/mtab.go
+++ b/mtab/mtab.go
@@ -1,3 +1,4 @@
+// Package mtab contains tools to work with /etc/mtab file.
 package mtab
 
 import (