diff --git a/changelog.html b/changelog.html
index 9d4ae1a1adfa5b474125833869708c4b98b62fbf..52a6c5ad38884268c6e0314752cd29955ab87068 100644
--- a/changelog.html
+++ b/changelog.html
@@ -63,6 +63,9 @@ Upcoming changes</a>
 <div id="rc" style="display:none;"><!--=BEGIN=-->
 <h3><a name=v1.522>What's new in 1.522</a> <!--=DATE=--></h3>
 <ul class=image>
+  <li class=bug>
+    Fixed a regression in the config form with some plugins
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-18585">issue 18585</a>)
   <li class=bug>
     Fixed a dead lock in the <tt>Project</tt> class and improved the signature of the persisted XML form a bit.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-18589">issue 18589</a>)
diff --git a/core/src/main/resources/lib/form/textarea/textarea.js b/core/src/main/resources/lib/form/textarea/textarea.js
index fa9d4aef86f6124c2eb110f74d513dc42774be50..b7db7aa38434e6e43b4bd79a67b256879762ddac 100644
--- a/core/src/main/resources/lib/form/textarea/textarea.js
+++ b/core/src/main/resources/lib/form/textarea/textarea.js
@@ -15,7 +15,7 @@ Behaviour.specify("TEXTAREA.codemirror", 'textarea', 0, function(e) {
         scroller.style.height = h+"px";
 
         // the form needs to be populated before the "Apply" button
-        YAHOO.util.Event.on(e.up('form'), "jenkins:apply", function() {
+    Element.on(e.up('form'),"jenkins:apply", function() {
             e.value = codemirror.getValue()
         })
     });