diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index f135c26..8a07f2c 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -73,12 +73,12 @@ final class BackendController extends Controller
         $view->setTemplate('/Modules/Tag/Theme/Backend/tag-list');
         $view->addData('nav', $this->app->moduleManager->get('Navigation')->createNavigationMid(1007501001, $request, $response));
 
-        if ($request->getData('ptype') === '-') {
+        if ($request->getData('ptype') === 'p') {
             $view->setData('tags',
                 TagMapper::withConditional('language', $response->getHeader()->getL11n()->getLanguage())
                     ::getBeforePivot((int) ($request->getData('id') ?? 0), null, 25)
             );
-        } elseif ($request->getData('ptype') === '+') {
+        } elseif ($request->getData('ptype') === 'n') {
             $view->setData('tags',
                 TagMapper::withConditional('language', $response->getHeader()->getL11n()->getLanguage())
                     ::getAfterPivot((int) ($request->getData('id') ?? 0), null, 25)
diff --git a/Theme/Backend/tag-list.tpl.php b/Theme/Backend/tag-list.tpl.php
index 5163fab..774d63f 100755
--- a/Theme/Backend/tag-list.tpl.php
+++ b/Theme/Backend/tag-list.tpl.php
@@ -20,8 +20,8 @@ use phpOMS\Uri\UriFactory;
  */
 $tags = $this->getData('tags');
 
-$previous = empty($tags) ? '{/prefix}tag/list' : '{/prefix}tag/list?{?}&id=' . \reset($tags)->getId() . '&ptype=-';
-$next     = empty($tags) ? '{/prefix}tag/list' : '{/prefix}tag/list?{?}&id=' . \end($tags)->getId() . '&ptype=+';
+$previous = empty($tags) ? '{/prefix}tag/list' : '{/prefix}tag/list?{?}&id=' . \reset($tags)->getId() . '&ptype=p';
+$next     = empty($tags) ? '{/prefix}tag/list' : '{/prefix}tag/list?{?}&id=' . \end($tags)->getId() . '&ptype=n';
 
 echo $this->getData('nav')->render(); ?>
 <div class="row">