diff --git a/example/net/poettering/Calculator.interface.yaml b/example/net/poettering/Calculator.interface.yaml
index af4dd1b..6e44093 100644
--- a/example/net/poettering/Calculator.interface.yaml
+++ b/example/net/poettering/Calculator.interface.yaml
@@ -53,6 +53,8 @@
     - name: Status
       type: enum[self.State]
       default: Success
+      flags:
+        - const
       description: >
         The current state of the Calculator.
     - name: Owner