diff --git a/sys/sys.go b/sys/sys.go
index e76b876..16e7d01 100644
--- a/sys/sys.go
+++ b/sys/sys.go
@@ -59,7 +59,7 @@ func ManageStatusCmd(cmd *exec.Cmd, err error) int {
 	return -1
 }
 
-func RunInteractiveCmd(cmd string, withStderr bool, buffers ...io.Writer) int {
+func RunInteractiveCmd(cmd string, withStderr bool, buffers ...*bytes.Buffer) int {
 	// fmt.Printf(" == go before command : %s\n", cmd)
 	icmd := exec.Command("bash", "-c", cmd)
 	icmd.Stdin = os.Stdin