diff --git a/src/runtime/trace/recorder.go b/src/runtime/trace/recorder.go
index 4f2d3aa92a4124..545af102ac0fec 100644
--- a/src/runtime/trace/recorder.go
+++ b/src/runtime/trace/recorder.go
@@ -112,7 +112,7 @@ func runtime_traceClockNow() uint64
 // frequency is nanoseconds per timestamp unit.
 type frequency float64
 
-// mul multiplies an unprocessed to produce a time in nanoseconds.
+// mul multiplies an unprocessed timestamp to produce a time in nanoseconds.
 func (f frequency) mul(t timestamp) eventTime {
 	return eventTime(float64(t) * float64(f))
 }