diff --git a/silk/views/summary.py b/silk/views/summary.py
index cdd21f63..71aa1aea 100644
--- a/silk/views/summary.py
+++ b/silk/views/summary.py
@@ -39,7 +39,7 @@ def _longest_query_by_view(self, filters):
         return requests
 
     def _time_spent_in_db_by_view(self, filters):
-        values_list = models.Request.objects.filter(*filters).values_list('view_name').annotate(t=Sum('queries__time_taken')).order_by('-t')[:5]
+        values_list = models.Request.objects.filter(*filters).values_list('view_name').annotate(t=Sum('queries__time_taken')).filter(db_time__gte=0).order_by('-t')[:5]
         requests = []
         for view, _ in values_list:
             r = models.Request.objects.filter(view_name=view, *filters).annotate(t=Sum('queries__time_taken')).order_by('-t')[0]