diff --git a/specification/securityinsights/resource-manager/readme.go.md b/specification/securityinsights/resource-manager/readme.go.md
index 474117dc1f7c..489a4424f85d 100644
--- a/specification/securityinsights/resource-manager/readme.go.md
+++ b/specification/securityinsights/resource-manager/readme.go.md
@@ -23,6 +23,16 @@ azure-arm: true
 batch:
   - tag: package-2020-01
   - tag: package-2019-01-preview
+  - tag: package-preview-2021-09
+```
+
+### Tag: package-preview-2021-09
+
+These settings apply only when `--tag=package-preview-2021-09 --go` is specified on the command line.
+Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
+
+```yaml $(tag) == 'package-preview-2021-09' && $(go)
+output-folder: $(go-sdk-folder)/services/preview/$(namespace)/mgmt/2021-09-01-preview/$(namespace)
 ```
 
 ### Tag: package-2020-01 and go