diff --git a/src/PhpSerial.php b/src/PhpSerial.php
index 1d253d5..0a6f6ce 100644
--- a/src/PhpSerial.php
+++ b/src/PhpSerial.php
@@ -47,7 +47,7 @@ public function PhpSerial()
         if (substr($sysName, 0, 5) === "Linux") {
             $this->_os = "linux";
 
-            if ($this->_exec("stty") === 0) {
+            if ($this->_exec("stty --version") === 0) {
                 register_shutdown_function(array($this, "deviceClose"));
             } else {
                 trigger_error(