diff --git a/lib/base.php b/lib/base.php
index 9cf0228bbd..2852c1443c 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -674,7 +674,7 @@ class OC {
 
 		self::registerCacheHooks();
 		self::registerFilesystemHooks();
-		if (\OC::$server->getSystemConfig()->getValue('enable_previews', true)) {
+		if ($systemConfig->getValue('enable_previews', true)) {
 			self::registerPreviewHooks();
 		}	
 		self::registerShareHooks();