diff --git a/shiftregister/metrics/views.py b/shiftregister/metrics/views.py
index 25a73d8..8a9cc6c 100644
--- a/shiftregister/metrics/views.py
+++ b/shiftregister/metrics/views.py
@@ -5,6 +5,10 @@ from django.db import models
 
 
 def metrics(request):
+    worked_seconds_total = ShiftRegistration.objects.filter(
+        state=ShiftRegistration.RegState.CHECKED_IN
+    ).aggregate(sum=Sum("shift__duration"))["sum"]
+
     response = HttpResponse(
         "\n".join(
             (
@@ -37,20 +41,18 @@ def metrics(request):
                         "messages_sent_total",
                         Message.objects.all().count(),
                     ),
+                    (
+                        "worked_seconds_total",
+                        worked_seconds_total.total_seconds()
+                        if worked_seconds_total
+                        else 0.0,
+                    ),
                     (
                         "worked_shifts_total",
                         ShiftRegistration.objects.filter(
                             state=ShiftRegistration.RegState.CHECKED_IN
                         ).count(),
                     ),
-                    (
-                        "worked_seconds_total",
-                        ShiftRegistration.objects.filter(
-                            state=ShiftRegistration.RegState.CHECKED_IN
-                        )
-                        .aggregate(sum=Sum("shift__duration"))["sum"]
-                        .total_seconds(),
-                    ),
                 )
             )
         )