diff --git a/lib/Gpio.php b/lib/Gpio.php
index 3e36423..ff88664 100644
--- a/lib/Gpio.php
+++ b/lib/Gpio.php
@@ -30,10 +30,10 @@ class Gpio implements \ArrayAccess
     
     public function __construct()
     {
-        if (!file_exists("/sys/gpio")) {
+        if (!file_exists("/sys/class/gpio")) {
             throw new HardwareException("gpio sysfs is not available");
         }
-        if (!is_writable("/sys/gpio/export")) {
+        if (!is_writable("/sys/class/gpio/export")) {
             throw new HardwareException("gpio sysfs is not writable");
         }
     }