diff --git a/example/readline-demo/readline-demo.go b/example/readline-demo/readline-demo.go
index f1bd716..c9fc1b7 100644
--- a/example/readline-demo/readline-demo.go
+++ b/example/readline-demo/readline-demo.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"os"
 	"strconv"
 	"strings"
 	"time"