diff --git a/src/Accessories/DeviceButton.ts b/src/Accessories/DeviceButton.ts
index ce5f5e0..ba7e284 100644
--- a/src/Accessories/DeviceButton.ts
+++ b/src/Accessories/DeviceButton.ts
@@ -109,7 +109,7 @@ export class DeviceButton implements IAccessory {
 
             //change state if stateful
             if (this._buttonInfo.IsStateful) {
-                this._buttonState != this._buttonState
+                this._buttonState = !this._buttonState
             } else {
                 this._switchService.getCharacteristic(Characteristic.On).updateValue(false);
                 return callback(new Error("Normal Response"));