diff --git a/lib/private/Files/Cache/Wrapper/CacheWrapper.php b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
index 39a78f31343..59da272787e 100644
--- a/lib/private/Files/Cache/Wrapper/CacheWrapper.php
+++ b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
@@ -91,7 +91,7 @@ class CacheWrapper extends Cache {
 	 */
 	public function get($file) {
 		$result = $this->getCache()->get($file);
-		if ($result) {
+		if ($result instanceof ICacheEntry) {
 			$result = $this->formatCacheEntry($result);
 		}
 		return $result;