diff --git a/types/onoff/index.d.ts b/types/onoff/index.d.ts
index 55701976a9..f4eba3ffb6 100644
--- a/types/onoff/index.d.ts
+++ b/types/onoff/index.d.ts
@@ -28,6 +28,8 @@ declare namespace __ONOFF {
             options?: GpioOptions
         );
         
+        static accessible: boolean;
+
         gpio: number;
         gpioPath: string;
         opts: GpioOptions;
diff --git a/types/onoff/onoff-tests.ts b/types/onoff/onoff-tests.ts
index 21b47e7f99..776b577348 100644
--- a/types/onoff/onoff-tests.ts
+++ b/types/onoff/onoff-tests.ts
@@ -14,3 +14,5 @@ setTimeout(function() {
     led.writeSync(0);
     led.unexport();
 }, 2000);
+
+var accessible:boolean = onoff.Gpio.accessible;