diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index 331328d638416..b1eedf5cad4b6 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -368,6 +368,15 @@ public class TelecomManager {
      */
     public static final String EXTRA_IS_HANDOVER = "android.telecom.extra.IS_HANDOVER";
 
+    /**
+     * Parcelable extra used with {@link #EXTRA_IS_HANDOVER} to indicate the source
+     * {@link PhoneAccountHandle} when initiating a handover which {@link ConnectionService}
+     * the handover is from.
+     * @hide
+     */
+    public static final String EXTRA_HANDOVER_FROM_PHONE_ACCOUNT =
+            "android.telecom.extra.HANDOVER_FROM_PHONE_ACCOUNT";
+
     /**
      * Extra key specified in the {@link ConnectionRequest#getExtras()} when Telecom calls
      * {@link ConnectionService#onCreateOutgoingConnection(PhoneAccountHandle, ConnectionRequest)}