diff --git a/Telegram/configure.bat b/Telegram/configure.bat
index 3e38d6ee5..85b9ddeba 100644
--- a/Telegram/configure.bat
+++ b/Telegram/configure.bat
@@ -1,5 +1,6 @@
 @echo OFF
 
+setlocal enabledelayedexpansion
 set "FullScriptPath=%~dp0"
 
 python %FullScriptPath%configure.py %*