diff --git a/core/minimizer.php b/core/minimizer.php
index 6828acc87d8..709c7508e90 100644
--- a/core/minimizer.php
+++ b/core/minimizer.php
@@ -1,4 +1,5 @@
 <?php
+session_write_close();
 
 OC_App::loadApps();