diff --git a/backend/src/index.ts b/backend/src/index.ts
index 325c1bf42764e53ae5dd164441153e717550a6e7..e60436ff271aa3b21d185634efef1ffaf4a0bfa1 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -81,7 +81,7 @@ server.get("/", async (request, reply) => {
     .table("shots")
     .select(
       connection.raw(
-        "width_bucket(extract(epoch from ended_at - began_at)*1000, 0, 60*1000, 60*10)*100 as bucket, count(*)",
+        "width_bucket(ended_at_gmtm - began_at_gmtm, 0, 60*1000, 60*10)*100 as bucket, count(*)",
       ),
     )
     .groupBy("bucket")