diff --git a/lib/private/Files/ObjectStore/ObjectStoreStorage.php b/lib/private/Files/ObjectStore/ObjectStoreStorage.php
index ebe87399ab4..02724e2e20a 100644
--- a/lib/private/Files/ObjectStore/ObjectStoreStorage.php
+++ b/lib/private/Files/ObjectStore/ObjectStoreStorage.php
@@ -710,6 +710,10 @@ class ObjectStoreStorage extends \OC\Files\Storage\Common implements IChunkedFil
 				$cache->remove($to);
 			}
 			$this->mkdir($to);
+			$cacheEntry = $cache->get(($to));
+			$cache->update($cacheEntry->getId(), [
+				'size' => $sourceEntry->getSize(),
+			]);
 
 			foreach ($sourceCache->getFolderContentsById($sourceEntry->getId()) as $child) {
 				$this->copyInner($sourceCache, $child, $to . '/' . $child->getName());