diff --git a/library/Icinga/Web/Widget/FilterEditor.php b/library/Icinga/Web/Widget/FilterEditor.php
index 9c3fb801e..bb8cc8599 100644
--- a/library/Icinga/Web/Widget/FilterEditor.php
+++ b/library/Icinga/Web/Widget/FilterEditor.php
@@ -512,7 +512,7 @@ class FilterEditor extends AbstractWidget
         $res = array();
         foreach ($array as $k => $v) {
             if (is_int($k)) {
-                $res[$v] = str_replace('_', ' ', ucfirst($v));
+                $res[$v] = ucwords(str_replace('_', ' ', $v));
             } elseif ($flip) {
                 $res[$v] = $k;
             } else {