diff --git a/util/util.go b/util/util.go
index 3e65b4d..5f53ea7 100644
--- a/util/util.go
+++ b/util/util.go
@@ -51,13 +51,13 @@ func CastStrings2ints(strs *[]string) []int {
 
 func PrettyByteSize(b int64) string {
 	bf := float64(b)
-	for _, unit := range []string{"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"} {
+	for _, unit := range []string{"", "Kio", "Mio", "Gio", "Tio", "Pio", "Eio", "Zio"} {
 		if math.Abs(bf) < 1024.0 {
 			return fmt.Sprintf("%3.2f%s", bf, unit)
 		}
 		bf /= 1024.0
 	}
-	return fmt.Sprintf("%.2fYi", bf)
+	return fmt.Sprintf("%.2fYio", bf)
 }
 
 func Ucfirst(str *string) {