diff --git a/lib/private/Files/Cache/Wrapper/CacheWrapper.php b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
index 6479ea793b000..d1a86489ffc87 100644
--- a/lib/private/Files/Cache/Wrapper/CacheWrapper.php
+++ b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
@@ -83,7 +83,7 @@ protected function formatCacheEntry($entry) {
 	 */
 	public function get($file) {
 		$result = $this->getCache()->get($file);
-		if ($result) {
+		if ($result instanceof ICacheEntry) {
 			$result = $this->formatCacheEntry($result);
 		}
 		return $result;