diff --git a/core/java/android/bluetooth/IBluetoothHeadsetPhone.aidl b/core/java/android/bluetooth/IBluetoothHeadsetPhone.aidl
index ab9dafe..163e4e2 100644
--- a/core/java/android/bluetooth/IBluetoothHeadsetPhone.aidl
+++ b/core/java/android/bluetooth/IBluetoothHeadsetPhone.aidl
@@ -18,6 +18,7 @@
   String getNetworkOperator();
   String getSubscriberNumber();
   boolean listCurrentCalls();
+  boolean queryPhoneState();
 
   // Internal for phone app to call
   void updateBtHandsfreeAfterRadioTechnologyChange();