diff --git a/docs/operator-manual/applicationset/Generators-Post-Selector.md b/docs/operator-manual/applicationset/Generators-Post-Selector.md
index 20f367ada7a1f..d8570859084ff 100644
--- a/docs/operator-manual/applicationset/Generators-Post-Selector.md
+++ b/docs/operator-manual/applicationset/Generators-Post-Selector.md
@@ -36,8 +36,24 @@ spec:
 ```
 
 The List generator + Post Selector generates a single set of parameters:
+
 ```yaml
 - cluster: engineering-dev
   url: https://kubernetes.default.svc
   env: staging
-```
\ No newline at end of file
+```
+
+It is also possible to use `matchExpressions` for more powerful selectors.
+
+```yaml
+spec:
+  generators:
+    - clusters: {}
+      selector:
+        matchExpressions:
+          - key: server
+            operator: In
+            values:
+              - https://kubernetes.default.svc
+              - https://some-other-cluster
+```