diff --git a/unifi_protect_backup/cli.py b/unifi_protect_backup/cli.py
index efdf5c4..0e6972d 100644
--- a/unifi_protect_backup/cli.py
+++ b/unifi_protect_backup/cli.py
@@ -109,7 +109,7 @@ def parse_rclone_retention(ctx, param, retention) -> relativedelta:
 @click.option(
     '--file-structure-format',
     envvar='FILE_STRUCTURE_FORMAT',
-    default="{camera_name}/{event.start:%Y-%m-%d}/{event.end:%Y-%m-%dT%H-%M-%S} {detection_type}.mp4",
+    default="{camera_name}/{event.start:%Y-%m-%d}/{event.start:%Y-%m-%dT%H-%M-%S} {detection_type}.mp4",
     show_default=True,
     help="A Python format string used to generate the file structure/name on the rclone remote."
     "For details of the fields available, see the projects `README.md` file.",