diff --git a/frigate/stats/util.py b/frigate/stats/util.py
index 9fae1178a9..daf740c482 100644
--- a/frigate/stats/util.py
+++ b/frigate/stats/util.py
@@ -242,7 +242,7 @@ async def set_gpu_stats(
 
 async def set_npu_usages(
     config: FrigateConfig, all_stats: dict[str, Any]
-) -> dict[str, Any]:
+) -> None:
     stats: dict[str, dict] = {}
 
     for detector in config.detectors.values():