diff --git a/index.php b/index.php
index 90b355c622b384ef574794fc054d5c4736329b51..127f3aa51bebe60cc26b11ab7b884f82af58fc33 100644
--- a/index.php
+++ b/index.php
@@ -29,7 +29,7 @@ if ($_SESSION["user_right"] == -1) {
  }
 
 // if user is logged and not use https, disconnect it!
-if ($_SERVER['HTTPS'] != "on" && $user_id > 0)
+if ($_SERVER['HTTPS'] != "on" && $_SESSION["user_id"] > 0)
   userDisconnect();
 ?>
 
diff --git a/public/connection.php b/public/connection.php
index 26d2b6ea9eadbd2e654873f90654726a1d6cbd31..397381c15fae49ce680f02f98e77173ef73858b0 100644
--- a/public/connection.php
+++ b/public/connection.php
@@ -194,8 +194,8 @@ return ($str);
 
 // Disconnect user
 function userDisconnect(){
-	$_SESSION["user_right"] = 0;
-	$_SESSION["user_id"] = 0;
+  $_SESSION["user_right"] = 0;
+  $_SESSION["user_id"] = 0;
 }