diff --git a/rules/DowngradePhp81/Rector/Array_/DowngradeArraySpreadStringKeyRector.php b/rules/DowngradePhp81/Rector/Array_/DowngradeArraySpreadStringKeyRector.php
index c362f8a2..991d668a 100644
--- a/rules/DowngradePhp81/Rector/Array_/DowngradeArraySpreadStringKeyRector.php
+++ b/rules/DowngradePhp81/Rector/Array_/DowngradeArraySpreadStringKeyRector.php
@@ -11,6 +11,8 @@
 use PHPStan\Type\ArrayType;
 use PHPStan\Type\Constant\ConstantArrayType;
 use PHPStan\Type\IntegerType;
+use PHPStan\Type\IntersectionType;
+use PHPStan\Type\UnionType;
 use Rector\DowngradePhp81\NodeAnalyzer\ArraySpreadAnalyzer;
 use Rector\DowngradePhp81\NodeFactory\ArrayMergeFromArraySpreadFactory;
 use Rector\PHPStan\ScopeFetcher;
@@ -94,6 +96,14 @@ private function shouldSkipArray(Array_ $array): bool
                 continue;
             }
 
+            if ($type instanceof UnionType) {
+                continue;
+            }
+
+            if ($type instanceof IntersectionType) {
+                continue;
+            }
+
             /** @var ArrayType|ConstantArrayType $type */
             $keyType = $type->getKeyType();
             if ($keyType instanceof IntegerType) {