diff --git a/container/mts/encoder.go b/container/mts/encoder.go
index 7a9aeddd..155ea03b 100644
--- a/container/mts/encoder.go
+++ b/container/mts/encoder.go
@@ -120,10 +120,10 @@ const (
 	// the current presentation timestamp.
 	ptsOffset = 700 * time.Millisecond
 
-	// PCRFrequency is the base Program Clock Reference frequency.
-	PCRFrequency = 90000 // Hz
+	// PCRFrequency is the base Program Clock Reference frequency in Hz.
+	PCRFrequency = 90000
 
-	// PTSFrequency is the presentation timestamp frequency.
+	// PTSFrequency is the presentation timestamp frequency in Hz.
 	PTSFrequency = 90000
 )