diff --git a/lib/GpioPin.php b/lib/GpioPin.php
index 01c91ab..3ed9b07 100644
--- a/lib/GpioPin.php
+++ b/lib/GpioPin.php
@@ -59,7 +59,7 @@ class GpioPin
             throw new \Exception;
         }
         $this->direction = $direction;
-        file_put_contents("/sys/class/gpio/{$this->pin}/direction", $direction);
+        file_put_contents("/sys/class/gpio/gpio{$this->pin}/direction", $direction);
         return $this;
     }
     
@@ -71,7 +71,7 @@ class GpioPin
     public function setValue($value)
     {
         $this->value = (bool)$value;
-        file_put_contents("/sys/class/gpio/{$this->pin}/value", (int)$this->value);
+        file_put_contents("/sys/class/gpio/gpio{$this->pin}/value", (int)$this->value);
         return $this;
     }
     
@@ -112,7 +112,7 @@ class GpioPin
             throw new \Exception;
         }
         $this->edge = $edge;
-        file_put_contents("/sys/class/gpio/{$this->pin}/edge", $edge);
+        file_put_contents("/sys/class/gpio/gpio{$this->pin}/edge", $edge);
         return $this;
     }