diff --git a/ChangeLog b/ChangeLog
index 69be006c63..a0cb3869e8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,7 @@ phpMyAdmin - ChangeLog
 4.6.1 (not yet released)
 - issue #12120 PMA_Util not found in insert_edit.lib.php
 - issue #12118 Fixed activation of some languages
+- issue #12121 Fixed error in 3NF step of normalization
 
 4.6.0.0 (2016-03-22)
 + issue #11456 Disabled storage engines
diff --git a/normalization.php b/normalization.php
index e732cff169..e3598e17ca 100644
--- a/normalization.php
+++ b/normalization.php
@@ -60,7 +60,7 @@ if (isset($_REQUEST['getNewTables3NF'])) {
     $dependencies = json_decode($_REQUEST['pd']);
     $tables = json_decode($_REQUEST['tables']);
     $newTables = PMA_getHtmlForNewTables3NF($dependencies, $tables, $db);
-    PMA_Response::getInstance()->disable();
+    PMA\libraries\Response::getInstance()->disable();
     PMA_headerJSON();
     echo json_encode($newTables);
     exit;