diff --git a/command.go b/command.go
index 0b85345..2041243 100644
--- a/command.go
+++ b/command.go
@@ -483,6 +483,10 @@ func (c *Command) Root() *Command {
 	return findRoot(c)
 }
 
+// ArgsLenAtDash will return the length of f.Args at the moment when a -- was
+// found during arg parsing. This allows your program to know which args were
+// before the -- and which came after. (Description from
+// https://godoc.org/github.com/spf13/pflag#FlagSet.ArgsLenAtDash).
 func (c *Command) ArgsLenAtDash() int {
 	return c.Flags().ArgsLenAtDash()
 }