diff --git a/check/check.go b/check/check.go
index 7a41b19..4f91340 100644
--- a/check/check.go
+++ b/check/check.go
@@ -18,6 +18,7 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"os"
 	"os/exec"
 	"regexp"
 	"strings"