diff --git a/libraries/operations.lib.php b/libraries/operations.lib.php
index f6f5823fae..64bd39d0c1 100644
--- a/libraries/operations.lib.php
+++ b/libraries/operations.lib.php
@@ -2047,7 +2047,7 @@ function PMA_changeAllColumnsCollation($db, $table, $tbl_collation)
     $GLOBALS['dbi']->selectDb($db);
 
     $change_all_collations_query = 'ALTER TABLE '
-        . PMA_Util::backquote($table)
+        . PMA\libraries\Util::backquote($table)
         . ' CONVERT TO';
 
     list($charset) = explode('_', $tbl_collation);