diff --git a/xyz/openbmc_project/Control/PowerSupplyRedundancy.interface.yaml b/xyz/openbmc_project/Control/PowerSupplyRedundancy.interface.yaml
index b99d51b..bf36a77 100644
--- a/xyz/openbmc_project/Control/PowerSupplyRedundancy.interface.yaml
+++ b/xyz/openbmc_project/Control/PowerSupplyRedundancy.interface.yaml
@@ -3,5 +3,7 @@
 properties:
     - name: PowerSupplyRedundancyEnabled
       type: boolean
+      flags:
+        - const
       description: >
           When true, the power supplies are redundant.