diff --git a/changelog.html b/changelog.html
index 6c4852b461..88cb8d8d1d 100644
--- a/changelog.html
+++ b/changelog.html
@@ -55,7 +55,9 @@ Upcoming changes</a>
 <!-- Record your changes in the trunk here. -->
 <div id="trunk" style="display:none"><!--=TRUNK-BEGIN=-->
 <ul class=image>
-  <li class=>
+  <li class="major bug">
+    Regression with environment variables in 1.600.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-27188">issue 27188</a>)
 </ul>
 </div><!--=TRUNK-END=-->