diff --git a/packages/BetterPhpDocParser/Attributes/Ast/AttributeAwareNodeFactory.php b/packages/BetterPhpDocParser/Attributes/Ast/AttributeAwareNodeFactory.php
index b24a1ae2827f..2e64f5519304 100644
--- a/packages/BetterPhpDocParser/Attributes/Ast/AttributeAwareNodeFactory.php
+++ b/packages/BetterPhpDocParser/Attributes/Ast/AttributeAwareNodeFactory.php
@@ -55,7 +55,7 @@ public function createFromNode(Node $node, string $docContent): Node
         $node = $this->phpDocNodeTraverser->traverseWithCallable($node, $docContent, function (
             Node $node,
             string $docContent
-        ) {
+        ): Node {
             if ($node instanceof UnionTypeNode && ! $node instanceof AttributeAwareUnionTypeNode) {
                 return new AttributeAwareUnionTypeNode($node->types, $docContent);
             }