diff --git a/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/skip_class_name_string.php.inc b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/skip_class_name_string.php.inc
new file mode 100644
index 00000000000..b1390230967
--- /dev/null
+++ b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector/Fixture/skip_class_name_string.php.inc
@@ -0,0 +1,15 @@
+<?php
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForCommonObjectDenominatorRector\Fixture;
+
+use PhpParser\Node\Stmt\Class_;
+
+final class SkipClassNameString
+{
+    public function run(): array
+    {
+        return [
+            Class_::class,
+        ];
+    }
+}
diff --git a/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php b/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php
index 150d923c587..47073b89061 100644
--- a/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php
+++ b/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForCommonObjectDenominatorRector.php
@@ -133,9 +133,9 @@ public function refactor(Node $node): ?Node
             }
 
             /**
-             * nested structure
+             * not an object, can be nested array, or string class as Foo::class
              */
-            if ($valueType->isArray()->yes()) {
+            if (! $valueType->isObject()->yes()) {
                 return null;
             }