diff --git a/rules-tests/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector/Fixture/skip_no_key_generic_object_return_doc.php.inc b/rules-tests/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector/Fixture/skip_no_key_generic_object_return_doc.php.inc
new file mode 100644
index 00000000000..f762a77f14b
--- /dev/null
+++ b/rules-tests/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector/Fixture/skip_no_key_generic_object_return_doc.php.inc
@@ -0,0 +1,15 @@
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\NarrowObjectReturnTypeRector\Fixture;
+
+final class SkipNoKeyGenericObjectReturnDoc
+{
+    /**
+     * @return \Iterator<\stdClass>
+     */
+    public function run(): \Iterator
+    {
+        $arr = [new \stdClass];
+        return new \ArrayIterator($arr);
+    }
+}
diff --git a/rules/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector.php b/rules/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector.php
index 826b960a60f..708bd0a9782 100644
--- a/rules/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector.php
+++ b/rules/TypeDeclaration/Rector/ClassMethod/NarrowObjectReturnTypeRector.php
@@ -12,6 +12,7 @@
 use PHPStan\PhpDocParser\Ast\Type\GenericTypeNode;
 use PHPStan\PhpDocParser\Ast\Type\IdentifierTypeNode;
 use PHPStan\Reflection\ClassReflection;
+use PHPStan\Type\Generic\GenericObjectType;
 use PHPStan\Type\ObjectType;
 use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfo;
 use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfoFactory;
@@ -147,7 +148,7 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
-        if (! $this->isNarrowingValid($declaredType, $actualReturnClass)) {
+        if (! $this->isNarrowingValid($node, $declaredType, $actualReturnClass)) {
             return null;
         }
 
@@ -228,7 +229,7 @@ private function isActualTypeAnonymous(string $actualType): bool
         return $classReflection->isAnonymous();
     }
 
-    private function isNarrowingValid(string $declaredType, string $actualType): bool
+    private function isNarrowingValid(ClassMethod $classMethod, string $declaredType, string $actualType): bool
     {
         if ($declaredType === 'object') {
             return true;
@@ -237,8 +238,18 @@ private function isNarrowingValid(string $declaredType, string $actualType): boo
         $actualObjectType = new ObjectType($actualType);
         $declaredObjectType = new ObjectType($declaredType);
 
-        return $declaredObjectType->isSuperTypeOf($actualObjectType)
-            ->yes();
+        if (! $declaredObjectType->isSuperTypeOf($actualObjectType)
+            ->yes()) {
+            return false;
+        }
+
+        $phpDocInfo = $this->phpDocInfoFactory->createFromNode($classMethod);
+        if (! $phpDocInfo instanceof PhpDocInfo) {
+            return true;
+        }
+
+        $returnType = $phpDocInfo->getReturnType();
+        return ! $returnType instanceof GenericObjectType;
     }
 
     private function hasParentMethodWithNonObjectReturn(ClassMethod $classMethod): bool