diff --git a/include/functions_user.inc.php b/include/functions_user.inc.php
index 0382d9c3d..d3aaa37cf 100644
--- a/include/functions_user.inc.php
+++ b/include/functions_user.inc.php
@@ -424,7 +424,7 @@ SELECT
       {
         $logger->info($logger_msg_prefix.'starts to wait for another request to build user_cache');
         $user_cache_waiting_start_time = get_moment();
-        for ($k = 0; $k < 10; $k++)
+        for ($k = 0; $k < 20; $k++)
         {
           sleep(1);