diff --git a/xyz/openbmc_project/Network/EthernetInterface.interface.yaml b/xyz/openbmc_project/Network/EthernetInterface.interface.yaml
index 8363505..c553014 100644
--- a/xyz/openbmc_project/Network/EthernetInterface.interface.yaml
+++ b/xyz/openbmc_project/Network/EthernetInterface.interface.yaml
@@ -32,6 +32,7 @@
           DNS servers on the interface.
       errors:
           - xyz.openbmc_project.Common.Error.InvalidArgument
+          - xyz::openbmc_project.Common.Error.NotAllowed
     - name: NTPServers
       type: array[string]
       description: >