diff --git a/core/java/android/os/IBinder.java b/core/java/android/os/IBinder.java
index 5c40c9a041ad8..174f3b67d448c 100644
--- a/core/java/android/os/IBinder.java
+++ b/core/java/android/os/IBinder.java
@@ -112,7 +112,8 @@ public interface IBinder {
     /**
      * Flag to {@link #transact}: this is a one-way call, meaning that the
      * caller returns immediately, without waiting for a result from the
-     * callee.
+     * callee. Applies only if the caller and callee are in different
+     * processes.
      */
     int FLAG_ONEWAY             = 0x00000001;
     
diff --git a/docs/html/guide/topics/fundamentals.jd b/docs/html/guide/topics/fundamentals.jd
index 807c7ff0e0e18..fd9af5095fc98 100644
--- a/docs/html/guide/topics/fundamentals.jd
+++ b/docs/html/guide/topics/fundamentals.jd
@@ -990,8 +990,8 @@ the RPC interface itself.
 </p>
 
 <p>
-An RPC interface can include only methods.
-All methods are executed synchronously (the local method blocks until the 
+An RPC interface can include only methods. By default,
+all methods are executed synchronously (the local method blocks until the
 remote method finishes), even if there is no return value.
 </p>