diff --git a/core/java/android/view/DisplayEventReceiver.java b/core/java/android/view/DisplayEventReceiver.java
index 3a74b2ed63a7c..c7f7456645617 100644
--- a/core/java/android/view/DisplayEventReceiver.java
+++ b/core/java/android/view/DisplayEventReceiver.java
@@ -138,8 +138,12 @@ public abstract class DisplayEventReceiver {
         mMessageQueue = null;
     }
 
-    static final class VsyncEventData {
-
+    /**
+     * Class to capture all inputs required for syncing events data.
+     *
+     * @hide
+     */
+    public static final class VsyncEventData {
         static final FrameTimeline[] INVALID_FRAME_TIMELINES =
                 {new FrameTimeline(FrameInfo.INVALID_VSYNC_ID, Long.MAX_VALUE, Long.MAX_VALUE)};