diff --git a/pyopencl/array.py b/pyopencl/array.py
index bf58c965c69d69820a405de7a90eb7cd1e74bc87..d419f62bac9bc8eb04d3eebcc1c97c78e0353eaf 100644
--- a/pyopencl/array.py
+++ b/pyopencl/array.py
@@ -412,6 +412,12 @@ class Array:
     care of its own operation ordering. The facilities in this section make
     this possible.
 
+    .. note::
+
+        Currently, read and write events are not distinguished.
+        As a result, e.g., read-only operations will needlessly wait on other
+        read-only operations (i.e., executed among asynchronous queues).
+
     .. versionadded:: 2014.1.1
 
     .. attribute:: events