diff --git a/src/image/jpeg/reader.go b/src/image/jpeg/reader.go
index 4a4706ffe7..b34072396c 100644
--- a/src/image/jpeg/reader.go
+++ b/src/image/jpeg/reader.go
@@ -14,9 +14,6 @@ import (
 	"io"
 )
 
-// TODO(nigeltao): fix up the doc comment style so that sentences start with
-// the name of the type or function that they annotate.
-
 // A FormatError reports that the input is not a valid JPEG.
 type FormatError string
 
diff --git a/src/image/png/writer.go b/src/image/png/writer.go
index 53adc1633c..cbcdb9e798 100644
--- a/src/image/png/writer.go
+++ b/src/image/png/writer.go
@@ -51,6 +51,7 @@ type encoder struct {
 	bw      *bufio.Writer
 }
 
+// CompressionLevel indicates the compression level.
 type CompressionLevel int
 
 const (