diff --git a/web/skins/classic/views/filter.php b/web/skins/classic/views/filter.php
index 8445d2c12..de2016489 100644
--- a/web/skins/classic/views/filter.php
+++ b/web/skins/classic/views/filter.php
@@ -130,6 +130,8 @@ $opTypes = array(
     '!~'  => translate('OpNotMatches'),
     '=[]' => translate('OpIn'),
     '![]' => translate('OpNotIn'),
+    'IN'  => translate('OpIn'),
+    'NOT IN' => translate('OpNotIn'),
     'IS'  => translate('OpIs'),
     'IS NOT'  => translate('OpIsNot'),
     'LIKE' => translate('OpLike'),