diff --git a/modules/ca/src/client/CAref.html b/modules/ca/src/client/CAref.html
index 741716116..7b6ff143f 100644
--- a/modules/ca/src/client/CAref.html
+++ b/modules/ca/src/client/CAref.html
@@ -3143,7 +3143,8 @@ indicating the current state of the channel.</p>
 <dl>
   <dt><code>COUNT</code></dt>
     <dd>The element count to be read from the specified channel. A count of
-      zero means use the current element count from the server.</dd>
+      zero means use the current element count from the server, effectively
+      resulting in a variable size array subscription.</dd>
 </dl>
 <dl>
   <dt><code>CHID</code></dt>