diff --git a/ChangeLog b/ChangeLog
index af4baff8e5..3e6dca4ca5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@ phpMyAdmin - ChangeLog
 - issue #12735 Incorrect parameters to escapeString in Node.php
 - issue #12734 Fix PHP error when mbstring is not installed
 - issue #12736 Don't force partition count to be specified when creating a new table
+- issue #12759 Fix Notice regarding 'Undefined index: old_usergroup'
 
 4.6.5 (2016-11-24)
 - issue        Remove potentionally license problematic sRGB profile
diff --git a/libraries/server_privileges.lib.php b/libraries/server_privileges.lib.php
index c328dd492a..208140de24 100644
--- a/libraries/server_privileges.lib.php
+++ b/libraries/server_privileges.lib.php
@@ -4355,7 +4355,7 @@ function PMA_addUser(
 
     // Copy the user group while copying a user
     $old_usergroup =
-        $_REQUEST['old_usergroup'] ? $_REQUEST['old_usergroup'] : null;
+        isset($_REQUEST['old_usergroup']) ? $_REQUEST['old_usergroup'] : null;
     PMA_setUserGroup($_REQUEST['username'], $old_usergroup);