diff --git a/xyz/openbmc_project/Time/EpochTime.interface.yaml b/xyz/openbmc_project/Time/EpochTime.interface.yaml
index 243802a..7b49fc0 100644
--- a/xyz/openbmc_project/Time/EpochTime.interface.yaml
+++ b/xyz/openbmc_project/Time/EpochTime.interface.yaml
@@ -7,4 +7,12 @@
           Time elpased since the
           Epoch(1 Jan 1970 00:00:00 UTC), in microseconds.
 
+          On setting this property, errors may be thrown.
+          InternalFailure means BMC fails to set the time.
+          InsufficientPermission means it is not allowed to set time depend
+          on the time settings.
+      errors:
+        - xyz.openbmc_project.Common.Error.InternalFailure
+        - xyz.openbmc_project.Common.Error.InsufficientPermission
+
 # vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4