diff --git a/stream/mts/encoder.go b/stream/mts/encoder.go
index 6b406536..093dbee5 100644
--- a/stream/mts/encoder.go
+++ b/stream/mts/encoder.go
@@ -251,7 +251,8 @@ func (e *Encoder) ccFor(pid int) byte {
 	return cc
 }
 
-// updateMeta ...
+// updateMeta adds/updates a metaData descriptor in the given psi bytes using data
+// contained in the global Meta struct.
 func updateMeta(b *[]byte) error {
 	p := psi.PSIBytes(*b)
 	err := p.AddDescriptor(psi.MetadataTag, Meta.Encode())