diff --git a/internal/percentage.go b/internal/percentage.go
index e321e0a..a8ef8be 100644
--- a/internal/percentage.go
+++ b/internal/percentage.go
@@ -13,6 +13,7 @@
 	return float64(int64(width)*current) / float64(total)
 }
 
+// PercentageRound same as Percentage but with math.Round.
 func PercentageRound(total, current int64, width int) float64 {
 	return math.Round(Percentage(total, current, width))
 }
diff --git a/internal/predicate.go b/internal/predicate.go
index 1c2902e..1e4dd24 100644
--- a/internal/predicate.go
+++ b/internal/predicate.go
@@ -1,5 +1,6 @@
 package internal
 
+// Predicate helper for internal use.
 func Predicate(pick bool) func() bool {
 	return func() bool { return pick }
 }