diff --git a/core/java/android/os/Handler.java b/core/java/android/os/Handler.java
index 14d8f0765f9d8..e6886c4d337d7 100644
--- a/core/java/android/os/Handler.java
+++ b/core/java/android/os/Handler.java
@@ -73,6 +73,9 @@ public class Handler {
     /**
      * Callback interface you can use when instantiating a Handler to avoid
      * having to implement your own subclass of Handler.
+     *
+     * @param msg A {@link android.os.Message Message} object
+     * @return True if no further handling is desired
      */
     public interface Callback {
         public boolean handleMessage(Message msg);