diff --git a/len.go b/len.go
index c6635d5..3e8f34b 100644
--- a/len.go
+++ b/len.go
@@ -4,7 +4,7 @@ package utf8s
 func Len(r rune) int {
 
 	switch {
-	case 127 > r:
+	case 127 >= r:
 		return 1
 
 	case 0x7FF >= r: