diff --git a/umap/views.py b/umap/views.py
index 73c98028..c42a5ead 100644
--- a/umap/views.py
+++ b/umap/views.py
@@ -275,7 +275,7 @@ class UserDashboard(PaginatorMixin, DetailView, SearchMixin):
 
     def get_maps(self):
         qs = self.get_search_queryset() or Map.objects.all()
-        qs = qs.filter(owner=self.object).union(qs.filter(editors=self.object))
+        qs = qs.union(qs.filter(owner=self.object), qs.filter(editors=self.object))
         return qs.order_by("-modified_at")
 
     def get_context_data(self, **kwargs):