diff --git a/src/unicode/graphic.go b/src/unicode/graphic.go
index ba90b4e518..81eae3e762 100644
--- a/src/unicode/graphic.go
+++ b/src/unicode/graphic.go
@@ -82,7 +82,7 @@ func IsControl(r rune) bool {
 	if uint32(r) <= MaxLatin1 {
 		return properties[uint8(r)]&pC != 0
 	}
-	// All control characters are < Latin1Max.
+	// All control characters are < MaxLatin1.
 	return false
 }