diff --git a/UPGRADING b/UPGRADING
index 46e0d3ff74319..a1f56cf59aa19 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -259,22 +259,22 @@ PHP 8.4 UPGRADE NOTES
     or by invoking their constructor directly.
 
 - PDO_DBLIB:
-  . Added class PdoDbLib.
+  . Added class Pdo\DbLib.
 
 - PDO_FIREBIRD:
-  . Added class PdoFirebird.
+  . Added class Pdo\Firebird.
 
 - PDO_MYSQL:
-  . Added class PdoMysql.
+  . Added class Pdo\Mysql.
 
 - PDO_ODBC:
-  . Added class PdoOdbc.
+  . Added class Pdo\Odbc.
 
 - PDO_PGSQL:
-  . Added class PdoPgsql.
+  . Added class Pdo\Pgsql.
 
 - PDO_SQLITE:
-  . Added class PdoSqlite.
+  . Added class Pdo\Sqlite.
 
 - POSIX:
   . Added constant POSIX_SC_CHILD_MAX