diff --git a/frigate/api/app.py b/frigate/api/app.py
index 8f0fcb5f06..c500f2b141 100644
--- a/frigate/api/app.py
+++ b/frigate/api/app.py
@@ -177,7 +177,9 @@ def metrics(request: Request):
     # Retrieve the latest statistics and update the Prometheus metrics
     stats = request.app.stats_emitter.get_latest_stats()
     # query DB for count of events by camera, label
-    event_counts: list[dict[str, Any]] = (
+    # Materialize the rows; the collector is shared across request threads and a
+    # lazy query would step one sqlite cursor from two threads.
+    event_counts: list[dict[str, Any]] = list(
         Event.select(Event.camera, Event.label, fn.Count())
         .group_by(Event.camera, Event.label)
         .dicts()