diff --git a/CHANGES b/CHANGES
index 9e5e13d..0b7b278 100644
--- a/CHANGES
+++ b/CHANGES
@@ -96,6 +96,7 @@
     * [KNOX-1602] - JsonFilterReader should handle strings, numbers, booleans, and null at root
     * [KNOX-1612] - GatewayAdminTopologyFuncTest#testPutTopology ClassNotFoundException
     * [KNOX-1616] - Fix portmapping with Jetty 9.4
+    * [KNOX-1639] - java.lang.IllegalStateException: No org.apache.tomcat.InstanceManager set in ServletContext
 
 ** Sub-task
     * [KNOX-1449] - Ensure all pom.xml files have same header