diff --git a/eBook/12.8.md b/eBook/12.8.md
index b0bfe14..aab5e3d 100644
--- a/eBook/12.8.md
+++ b/eBook/12.8.md
@@ -93,7 +93,7 @@ func main() {
 			return
 		}
 		outputString := string(inputString[2:5]) + "\r\n"
-		n, err := outputWriter.WriteString(outputString)
+		_, err := outputWriter.WriteString(outputString)
 		if err != nil {
 			fmt.Println(err)
 			return