diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 7423e90956..f6b132cf81 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -40,3 +40,6 @@
 * Added the ability to set custom environment variables set for playbook runs,
   inventory updates, project updates, and notification sending.
   [[#3508](https://github.com/ansible/ansible-tower/issues/3508)]
+* Added --diff mode to Job Templates and Ad-Hoc Commands.  The diff can be found in the
+  standard out when --diff mode is enabled.  
+  [[#4525](https://github.com/ansible/ansible-tower/issues/4325)]