diff --git a/assetutil/helper.go b/assetutil/helper.go
index ff53855f..037d4e39 100644
--- a/assetutil/helper.go
+++ b/assetutil/helper.go
@@ -76,6 +76,7 @@ func MustLoadRegexpMap(path string) RegexpMap {
 	return remap
 }
 
+// MustLoadStringSet load one or more paths containing lines into a string set.
 func MustLoadStringSet(paths ...string) *container.StringSet {
 	s := container.NewStringSet()
 	for _, path := range paths {