diff --git a/websocket.go b/websocket.go
index 6def955d..c0737cad 100644
--- a/websocket.go
+++ b/websocket.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"os"
 	"runtime"
 	"sync"
 	"sync/atomic"