diff --git a/yaml/xyz/openbmc_project/Chassis/Buttons/Power.interface.yaml b/yaml/xyz/openbmc_project/Chassis/Buttons/Power.interface.yaml
index ad41aa4..ab61609 100644
--- a/yaml/xyz/openbmc_project/Chassis/Buttons/Power.interface.yaml
+++ b/yaml/xyz/openbmc_project/Chassis/Buttons/Power.interface.yaml
@@ -7,7 +7,6 @@
       errors:
           - xyz.openbmc_project.Chassis.Common.Error.UnsupportedCommand
           - xyz.openbmc_project.Chassis.Common.Error.IOError
-
     - name: simLongPress
       description: >
           Emulate power button long press.
@@ -30,6 +29,11 @@
     - name: Released
       description: >
           Power button released signal
+      properties:
+          - name: time
+            type: uint64
+            description: >
+                Power button pressing duration in microseconds
     - name: Pressed
       description: >
           Power button pressed signal