diff --git a/frontend/src/components/dialog/lib-sub-folder-set-group-permission-dialog.js b/frontend/src/components/dialog/lib-sub-folder-set-group-permission-dialog.js
index 196aa0c89d..32dc45ca14 100644
--- a/frontend/src/components/dialog/lib-sub-folder-set-group-permission-dialog.js
+++ b/frontend/src/components/dialog/lib-sub-folder-set-group-permission-dialog.js
@@ -290,6 +290,7 @@ class LibSubFolderSetGroupPermissionDialog extends React.Component {
     );
     return (
       <Fragment>
+        <p className="text-gray small">{gettext('Folder permission is only effective after the library is shared to users or groups. It is used to fine tune sub-folder permissions.')}</p>
         <table className="w-xs-250">
           {thead}
           <tbody>
diff --git a/frontend/src/components/dialog/lib-sub-folder-set-user-permission-dialog.js b/frontend/src/components/dialog/lib-sub-folder-set-user-permission-dialog.js
index ad95af290f..b41a2dd33e 100644
--- a/frontend/src/components/dialog/lib-sub-folder-set-user-permission-dialog.js
+++ b/frontend/src/components/dialog/lib-sub-folder-set-user-permission-dialog.js
@@ -270,6 +270,7 @@ class LibSubFolderSetUserPermissionDialog extends React.Component {
     );
     return (
       <Fragment>
+        <p className="text-gray small">{gettext('Folder permission is only effective after the library is shared to users or groups. It is used to fine tune sub-folder permissions.')}</p>
         <table className="w-xs-250">
           {thead}
           <tbody>