diff --git a/api/current.txt b/api/current.txt
index 31d0c6c36402c..a02db742d43d6 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -24441,6 +24441,7 @@ package android.telecomm {
   public final class TelecommConstants {
     ctor public TelecommConstants();
     field public static final java.lang.String ACTION_INCOMING_CALL = "android.intent.action.INCOMING_CALL";
+    field public static final java.lang.String EXTRA_CALL_ID = "android.telecomm.extra.CALL_ID";
     field public static final java.lang.String EXTRA_CALL_SERVICE_DESCRIPTOR = "android.intent.extra.CALL_SERVICE_DESCRIPTOR";
     field public static final java.lang.String EXTRA_INCOMING_CALL_EXTRAS = "android.intent.extra.INCOMING_CALL_EXTRAS";
   }
diff --git a/telecomm/java/android/telecomm/TelecommConstants.java b/telecomm/java/android/telecomm/TelecommConstants.java
index 564f0cb89372c..08f39e38d3391 100644
--- a/telecomm/java/android/telecomm/TelecommConstants.java
+++ b/telecomm/java/android/telecomm/TelecommConstants.java
@@ -52,4 +52,10 @@ public final class TelecommConstants {
      */
     public static final String EXTRA_INCOMING_CALL_EXTRAS =
             "android.intent.extra.INCOMING_CALL_EXTRAS";
+
+    /**
+     * Optional extra for {@link TelephonyManager.ACTION_PHONE_STATE_CHANGED} containing the unique
+     * ID of the call.
+     */
+    public static final String EXTRA_CALL_ID = "android.telecomm.extra.CALL_ID";
 }