diff --git a/client.go b/client.go
index 91402c9..dcbb4e1 100644
--- a/client.go
+++ b/client.go
@@ -112,7 +112,7 @@ func (c *ClientConn) CutText(text string) error {
 
 	for _, char := range text {
 		if char > unicode.MaxLatin1 {
-			return fmt.Errorf("Character '%s' is not valid Latin-1", char)
+			return fmt.Errorf("Character '%v' is not valid Latin-1", char)
 		}
 
 		if err := binary.Write(&buf, binary.BigEndian, uint8(char)); err != nil {