diff --git a/regex/compile.go b/regex/compile.go
index c98e857..b12e862 100644
--- a/regex/compile.go
+++ b/regex/compile.go
@@ -47,6 +47,7 @@ func (re *Reg) UnmarshalText(text []byte) error {
 	return err
 }
 
+// Longest makes future searches prefer the longest branch of an alternation, as opposed to the leftmost branch.
 func (re *Reg) Longest() {
 	re.preferLongest = true
 }