diff --git a/app/code/Magento/Catalog/Model/Category.php b/app/code/Magento/Catalog/Model/Category.php
index 9d6d7e41ff34e..773ef9d536e01 100644
--- a/app/code/Magento/Catalog/Model/Category.php
+++ b/app/code/Magento/Catalog/Model/Category.php
@@ -448,7 +448,9 @@ public function move($parentId, $afterCategoryId)
         if ($this->flatState->isFlatEnabled()) {
             $flatIndexer = $this->indexerRegistry->get(Indexer\Category\Flat\State::INDEXER_ID);
             if (!$flatIndexer->isScheduled()) {
-                $flatIndexer->reindexList([$this->getId(), $oldParentId, $parentId]);
+                $sameLevelCategories = explode(',', $this->getParentCategory()->getChildren());
+                $list = array_unique(array_merge($sameLevelCategories, [$this->getId(), $oldParentId, $parentId]));
+                $flatIndexer->reindexList($list);
             }
         }
         $productIndexer = $this->indexerRegistry->get(Indexer\Category\Product::INDEXER_ID);