diff --git a/awx/main/access.py b/awx/main/access.py
index 8e0fe1c214..67bb01905d 100644
--- a/awx/main/access.py
+++ b/awx/main/access.py
@@ -1366,7 +1366,7 @@ class JobTemplateAccess(BaseAccess):
             'job_tags', 'force_handlers', 'skip_tags', 'ask_variables_on_launch',
             'ask_tags_on_launch', 'ask_job_type_on_launch', 'ask_skip_tags_on_launch',
             'ask_inventory_on_launch', 'ask_credential_on_launch', 'survey_enabled',
-            'custom_virtualenv',
+            'custom_virtualenv', 'diff_mode',
 
             # These fields are ignored, but it is convenient for QA to allow clients to post them
             'last_job_run', 'created', 'modified',