diff --git a/data/helpers.d/setting b/data/helpers.d/setting
index 502da1ed7..d083ed563 100644
--- a/data/helpers.d/setting
+++ b/data/helpers.d/setting
@@ -176,6 +176,8 @@ else:
     elif action == "set":
         if key in ['redirected_urls', 'redirected_regex']:
             value = yaml.load(value)
+        if key in ["unprotected_uris", "unprotected_regex", "protected_uris", "protected_regex"]:
+           logger.warning("/!\\ Packagers ! This app is using the legacy permission system. Please delete these legacy settings and use the new helpers ynh_permission_{create,urls,update,delete} and the 'visitors' group to manage public/private access.")
         settings[key] = value
     else:
         raise ValueError("action should either be get, set or delete")
@@ -249,7 +251,7 @@ ynh_permission_create() {
 
 # Remove a permission for the app (note that when the app is removed all permission is automatically removed)
 #
-# usage: ynh_permission_remove --permission "permission"
+# usage: ynh_permission_delete --permission "permission"
 # | arg: permission - the name for the permission (by default a permission named "main" is removed automatically when the app is removed)
 #
 # example: ynh_permission_delete --permission editors
diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 52371ff29..8b0c99d46 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -1037,6 +1037,8 @@ def app_addaccess(apps, users=[]):
     """
     from yunohost.permission import user_permission_update
 
+    logger.warning("/!\\ Packagers ! This app is using the legacy permission system. Please use the new helpers ynh_permission_{create,urls,update,delete} and the 'visitors' group to manage permissions.")
+
     output = {}
     for app in apps:
         permission = user_permission_update(app+".main", add=users)
@@ -1056,6 +1058,8 @@ def app_removeaccess(apps, users=[]):
     """
     from yunohost.permission import user_permission_update
 
+    logger.warning("/!\\ Packagers ! This app is using the legacy permission system. Please use the new helpers ynh_permission_{create,urls,update,delete} and the 'visitors' group to manage permissions.")
+
     output = {}
     for app in apps:
         permission = user_permission_update(app+".main", remove=users)
@@ -1074,6 +1078,8 @@ def app_clearaccess(apps):
     """
     from yunohost.permission import user_permission_reset
 
+    logger.warning("/!\\ Packagers ! This app is using the legacy permission system. Please use the new helpers ynh_permission_{create,urls,update,delete} and the 'visitors' group to manage permissions.")
+
     output = {}
     for app in apps:
         permission = user_permission_reset(app+".main")
@@ -1181,6 +1187,8 @@ def app_setting(app, key, value=None, delete=False):
             # FIXME: Allow multiple values for some keys?
             if key in ['redirected_urls', 'redirected_regex']:
                 value = yaml.load(value)
+            if key in ["unprotected_uris", "unprotected_regex", "protected_uris", "protected_regex"]:
+                logger.warning("/!\ Packagers ! This app is using the legacy permission system. Please delete these legacy settings and use the new helpers ynh_permission_{create,urls,update,delete} and the 'visitors' group to manage public/private access.")
             app_settings[key] = value
         _set_app_settings(app, app_settings)