diff --git a/api/runtime_thermostat_summary.php b/api/runtime_thermostat_summary.php
index 4b2f2d8..64ee723 100755
--- a/api/runtime_thermostat_summary.php
+++ b/api/runtime_thermostat_summary.php
@@ -11,7 +11,7 @@ class runtime_thermostat_summary extends cora\crud {
     'private' => [
       'read_id',
       'sync',
-      'populate'
+      'populate_backwards'
     ],
     'public' => []
   ];