diff --git a/telephony/java/com/android/internal/telephony/ITelephony.aidl b/telephony/java/com/android/internal/telephony/ITelephony.aidl
index b70937cee8a1a..363d6f57b603f 100644
--- a/telephony/java/com/android/internal/telephony/ITelephony.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephony.aidl
@@ -2138,6 +2138,11 @@ interface ITelephony {
      */
     int setImsProvisioningString(int subId, int key, String value);
 
+    /**
+     * Start emergency callback mode for testing.
+     */
+    void startEmergencyCallbackMode();
+
     /**
      * Update Emergency Number List for Test Mode.
      */