diff --git a/core/java/android/hardware/hdmi/HdmiTimerRecordSources.java b/core/java/android/hardware/hdmi/HdmiTimerRecordSources.java
index bf97375c8f958..6fe13ca8e375a 100644
--- a/core/java/android/hardware/hdmi/HdmiTimerRecordSources.java
+++ b/core/java/android/hardware/hdmi/HdmiTimerRecordSources.java
@@ -183,7 +183,12 @@ public class HdmiTimerRecordSources {
         }
     }
 
-    private static class TimeUnit {
+    /**
+     * Base class for time-related information.
+     * @hide
+     */
+    @SystemApi
+    /* package */ static class TimeUnit {
         /* package */ final int mHour;
         /* package */ final int mMinute;