diff --git a/cordova-plugin-device/index.d.ts b/cordova-plugin-device/index.d.ts
index 494b04f1e2..cb75703d1a 100644
--- a/cordova-plugin-device/index.d.ts
+++ b/cordova-plugin-device/index.d.ts
@@ -13,6 +13,8 @@
 interface Device {
     /** Get the version of Cordova running on the device. */
     cordova: string;
+    /** Indicates that Cordova initialize successfully. */
+    available: boolean;
     /**
      * The device.model returns the name of the device's model or product. The value is set
      * by the device manufacturer and may be different across versions of the same product.
@@ -31,4 +33,4 @@ interface Device {
 	/** Get the device hardware serial number. */
 	serial: string;}
 
-declare var device: Device;
\ No newline at end of file
+declare var device: Device;