diff --git a/lib/state.js b/lib/state.js
index ca3096ba2..9ad4fa4c9 100644
--- a/lib/state.js
+++ b/lib/state.js
@@ -10,7 +10,7 @@ const dontCacheProperties = [
     'action', 'button', 'button_left', 'button_right', 'click', 'forgotten', 'keyerror',
     'step_size', 'transition_time', 'action_color_temperature', 'action_color',
     'action_group', 'group_list', 'group_capacity', 'no_occupancy_since',
-    'step_mode', 'transition_time', 'duration',
+    'step_mode', 'transition_time', 'duration', 'elapsed',
 ];
 
 class State {