diff --git a/analyzer-baseline.toml b/analyzer-baseline.toml
index 0f0fa4a6..c2815625 100644
--- a/analyzer-baseline.toml
+++ b/analyzer-baseline.toml
@@ -1992,18 +1992,6 @@ code = "possibly-undefined-string-array-index"
 message = "Possibly undefined array key `string('combine')` accessed on `array<string, array<string, list<array<int|string, string>|null>>|string>`."
 count = 1
 
-[[issues]]
-file = "src/Sql/Combine.php"
-code = "undefined-int-array-index"
-message = 'Undefined list index `1` accessed on `list{PhpDb\Sql\Select}`.'
-count = 1
-
-[[issues]]
-file = "src/Sql/Combine.php"
-code = "undefined-int-array-index"
-message = 'Undefined list index `2` accessed on `list{PhpDb\Sql\Select}`.'
-count = 1
-
 [[issues]]
 file = "src/Sql/Ddl/AlterTable.php"
 code = "class-must-be-final"
diff --git a/src/Sql/Combine.php b/src/Sql/Combine.php
index 0971b481..5053ba64 100644
--- a/src/Sql/Combine.php
+++ b/src/Sql/Combine.php
@@ -93,7 +93,8 @@ public function combine(Select|array $select, string $type = self::COMBINE_UNION
         if (is_array($select)) {
             foreach ($select as $combine) {
                 if ($combine instanceof Select) {
-                    $combine = [$combine];
+                    $this->combine($combine, $type, $modifier);
+                    continue;
                 }
 
                 $this->combine(