diff --git a/xyz/openbmc_project/User/Manager.interface.yaml b/xyz/openbmc_project/User/Manager.interface.yaml
index 3874071..5784ea1 100644
--- a/xyz/openbmc_project/User/Manager.interface.yaml
+++ b/xyz/openbmc_project/User/Manager.interface.yaml
@@ -101,11 +101,15 @@
 properties:
     - name: AllPrivileges
       type: array[string]
+      flags:
+          - const
       description: >
           Lists all available user privileges in the system.
 
     - name: AllGroups
       type: array[string]
+      flags:
+          - const
       description: >
           Lists all available groups in the system.