diff --git a/src/web/server.py b/src/web/server.py
index 930b60e..b394231 100644
--- a/src/web/server.py
+++ b/src/web/server.py
@@ -57,6 +57,8 @@ if _ui_dist_env:
     UI_DIST_DIR = Path(_ui_dist_env).resolve()
 else:
     # Priority order: pi-multifx-pedal-ui (Helix style) -> src/web/ui-dist (legacy) -> frontend-react (deprecated)
+    # NOTE: On the pedal, UI_DIST_DIR is set in the systemd service to
+    # the explicit path to avoid the wrong build being picked up.
     _candidates = [
         Path(__file__).resolve().parent.parent.parent.parent / "pi-multifx-pedal-ui" / "dist",
         Path(__file__).resolve().parent / "ui-dist",