diff --git a/codec/h264/h264dec/slice.go b/codec/h264/h264dec/slice.go
index ee8ed35e..5295d27c 100644
--- a/codec/h264/h264dec/slice.go
+++ b/codec/h264/h264dec/slice.go
@@ -9,7 +9,7 @@ import (
 	"github.com/pkg/errors"
 )
 
-// Slice types.
+// Slice types as defined by table 7-6 in specifications.
 const (
 	sliceTypeP  = 0
 	sliceTypeB  = 1