diff --git a/umap/tests/test_views.py b/umap/tests/test_views.py
index 780cf5ad..e53d2230 100644
--- a/umap/tests/test_views.py
+++ b/umap/tests/test_views.py
@@ -11,6 +11,8 @@ from django.test import RequestFactory
 from umap import VERSION
 from umap.views import validate_url
 
+from .base import UserFactory
+
 User = get_user_model()
 
 
@@ -283,6 +285,21 @@ def test_user_dashboard_display_user_maps(client, map):
     assert "Owner only" in body
 
 
+@pytest.mark.django_db
+def test_user_dashboard_display_user_maps_distinct(client, map):
+    # cf https://github.com/umap-project/umap/issues/1325
+    user1 = UserFactory(username='user1')
+    user2 = UserFactory(username='user2')
+    map.editors.add(user1)
+    map.editors.add(user2)
+    map.save()
+    client.login(username=map.owner.username, password="123123")
+    response = client.get(reverse("user_dashboard"))
+    assert response.status_code == 200
+    body = response.content.decode()
+    assert body.count(map.name) == 1
+
+
 @pytest.mark.django_db
 def test_logout_should_return_json_in_ajax(client, user, settings):
     client.login(username=user.username, password="123123")
diff --git a/umap/views.py b/umap/views.py
index f33296d9..73c98028 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(Q(owner=self.object) | Q(editors=self.object))
+        qs = qs.filter(owner=self.object).union(qs.filter(editors=self.object))
         return qs.order_by("-modified_at")
 
     def get_context_data(self, **kwargs):