diff --git a/lib/private/Files/Cache/Cache.php b/lib/private/Files/Cache/Cache.php
index de09b9c42cb..a9934836b8a 100644
--- a/lib/private/Files/Cache/Cache.php
+++ b/lib/private/Files/Cache/Cache.php
@@ -660,7 +660,7 @@ class Cache implements ICache {
 			$targetPath = $this->normalize($targetPath);
 
 			$sourceData = $sourceCache->get($sourcePath);
-			if ($sourceData === false) {
+			if (!$sourceData) {
 				throw new \Exception('Invalid source storage path: ' . $sourcePath);
 			}