diff --git a/protocol/wayland.xml b/protocol/wayland.xml
index 89e6aab6..784d9712 100644
--- a/protocol/wayland.xml
+++ b/protocol/wayland.xml
@@ -960,9 +960,10 @@
 	immediately before receiving keyboard focus and when a new
 	selection is set while the client has keyboard focus.  The
 	data_offer is valid until a new data_offer or NULL is received
-	or until the client loses keyboard focus.  The client must
-	destroy the previous selection data_offer, if any, upon receiving
-	this event.
+	or until the client loses keyboard focus.  Switching surface with
+	keyboard focus within the same client doesn't mean a new selection
+	will be sent.  The client must destroy the previous selection
+	data_offer, if any, upon receiving this event.
       </description>
       <arg name="id" type="object" interface="wl_data_offer" allow-null="true"
 	   summary="selection data_offer object"/>