diff --git a/adoc/extensions/sycl_khr_queue_empty_query.adoc b/adoc/extensions/sycl_khr_queue_empty_query.adoc
index ab1fd205..4c6c9066 100644
--- a/adoc/extensions/sycl_khr_queue_empty_query.adoc
+++ b/adoc/extensions/sycl_khr_queue_empty_query.adoc
@@ -40,6 +40,8 @@ which provides information about the emptiness of the queue.
 bool khr_empty() const
 ----
 
+_Synchronization_:  When this function returns [code]#true#, equivalent to [code]#queue::wait()#.
+
 _Returns:_ [code]#true# if all <<command,commands>> enqueued on this queue have
 completed, [code]#false# otherwise.