diff --git a/weblate/trans/models/project.py b/weblate/trans/models/project.py
index ca6f5e488194..861bb48fe243 100644
--- a/weblate/trans/models/project.py
+++ b/weblate/trans/models/project.py
@@ -27,6 +27,7 @@
 from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.auth.models import Group
+from django.core.cache import cache
 import os
 import os.path
 from weblate.lang.models import Language
@@ -66,10 +67,21 @@ def get_acl_status(self, user):
         and flag whether there is any filtering active.
         """
         projects = self.all()
-        project_ids = [
-            project.id for project in projects if project.has_acl(user)
-        ]
-        if projects.count() == len(project_ids):
+
+        cache_key = 'acl-project-{0}'.format(user.id)
+
+        last_result = cache.get(cache_key)
+        if last_result is not None:
+            all_projects, project_ids = last_result
+        else:
+            project_ids = [
+                project.id for project in projects if project.has_acl(user)
+            ]
+            all_projects = (projects.count() == len(project_ids))
+
+            cache.set(cache_key, (all_projects, project_ids))
+
+        if all_projects:
             return projects, False
         return self.filter(id__in=project_ids), True