diff --git a/reference/curl/functions/curl-setopt.xml b/reference/curl/functions/curl-setopt.xml
index 0aa86457fc..6974baa8cf 100644
--- a/reference/curl/functions/curl-setopt.xml
+++ b/reference/curl/functions/curl-setopt.xml
@@ -677,6 +677,7 @@
             should be kept at 2 (default value).
            </entry>
            <entry valign="top">
+            Support for value 1 removed in cURL 7.28.1
            </entry>
           </row>
           <row>