diff --git a/src/Compat/FilterProcessor.php b/src/Compat/FilterProcessor.php
index b6c9bdc..f704071 100644
--- a/src/Compat/FilterProcessor.php
+++ b/src/Compat/FilterProcessor.php
@@ -85,6 +85,10 @@ public static function assemblePredicate(Filter\Condition $filter)
             }
         } elseif ($filter instanceof Filter\Unequal) {
             return ["($column != ? OR $column IS NULL)" => $expression];
+        } elseif ($filter instanceof Filter\HasNotValue) {
+            return ["$column IS NULL"];
+        } elseif ($filter instanceof  Filter\HasValue) {
+            return ["$column IS NOT NULL"];
         } else {
             if ($filter instanceof Filter\Equal) {
                 $operator = '=';