diff --git a/apex/permission/service/java/com/android/permission/persistence/IoUtils.java b/apex/permission/service/java/com/android/permission/persistence/IoUtils.java
index 0ae44603516e0..569a78c0ab410 100644
--- a/apex/permission/service/java/com/android/permission/persistence/IoUtils.java
+++ b/apex/permission/service/java/com/android/permission/persistence/IoUtils.java
@@ -20,6 +20,8 @@ import android.annotation.NonNull;
 
 /**
  * Utility class for IO.
+ *
+ * @hide
  */
 public class IoUtils {