diff --git a/src/pkg/time/tick.go b/src/pkg/time/tick.go
index b92c339c02..3b42b66cfe 100644
--- a/src/pkg/time/tick.go
+++ b/src/pkg/time/tick.go
@@ -17,6 +17,7 @@ type Ticker struct {
 // time with a period specified by the duration argument.
 // It adjusts the intervals or drops ticks to make up for slow receivers.
 // The duration d must be greater than zero; if not, NewTicker will panic.
+// Stop the ticker to release associated resources.
 func NewTicker(d Duration) *Ticker {
 	if d <= 0 {
 		panic(errors.New("non-positive interval for NewTicker"))