diff --git a/taiga/projects/notifications/services.py b/taiga/projects/notifications/services.py
index 73681319..b7223fba 100644
--- a/taiga/projects/notifications/services.py
+++ b/taiga/projects/notifications/services.py
@@ -377,12 +377,13 @@ def get_projects_watched(user_or_id):
     """
 
     if isinstance(user_or_id, get_user_model()):
-        user_id = user_or_id.id
+        user = user_or_id
     else:
-        user_id = user_or_id
+        user = get_user_model().objects.get(id=user_or_id)
 
     project_class = apps.get_model("projects", "Project")
-    return project_class.objects.filter(notify_policies__user__id=user_id).exclude(notify_policies__notify_level=NotifyLevel.none)
+    project_ids = user.notify_policies.exclude(notify_level=NotifyLevel.none).values_list("project__id", flat=True)
+    return project_class.objects.filter(id__in=project_ids)
 
 def add_watcher(obj, user):
     """Add a watcher to an object.