diff --git a/tv/input/aidl/aidl_api/android.hardware.tv.input/current/android/hardware/tv/input/TvMessage.aidl b/tv/input/aidl/aidl_api/android.hardware.tv.input/current/android/hardware/tv/input/TvMessage.aidl
index 637b01c..04cb099 100644
--- a/tv/input/aidl/aidl_api/android.hardware.tv.input/current/android/hardware/tv/input/TvMessage.aidl
+++ b/tv/input/aidl/aidl_api/android.hardware.tv.input/current/android/hardware/tv/input/TvMessage.aidl
@@ -37,4 +37,5 @@
   String subType;
   long groupId;
   int dataLengthBytes;
+  const long NO_GROUP_ID = (-1) /* -1 */;
 }
diff --git a/tv/input/aidl/android/hardware/tv/input/TvMessage.aidl b/tv/input/aidl/android/hardware/tv/input/TvMessage.aidl
index 6df1f9a..88da538 100644
--- a/tv/input/aidl/android/hardware/tv/input/TvMessage.aidl
+++ b/tv/input/aidl/android/hardware/tv/input/TvMessage.aidl
@@ -19,6 +19,10 @@
 @VintfStability
 parcelable TvMessage {
     /**
+     * This value for TvMessage.groupId denotes that the message doesn't belong to any group.
+     */
+    const long NO_GROUP_ID = -1;
+    /**
      * Extended data type, like “ATSC A/336 Watermark”, “ATSC_CC”, etc. This is opaque
      * to the framework.
      */