diff --git a/src/data/recorder.ts b/src/data/recorder.ts
index 510212c1e8..1f12f5e9e2 100644
--- a/src/data/recorder.ts
+++ b/src/data/recorder.ts
@@ -267,7 +267,7 @@ export const adjustStatisticsSum = (
   return hass.callWS({
     type: "recorder/adjust_sum_statistics",
     statistic_id,
-    start_time_iso,
+    start_time: start_time_iso,
     adjustment,
     adjustment_unit_of_measurement,
   });