diff --git a/Telegram/PrepareWin.bat b/Telegram/PrepareWin.bat
index 1bebd5525e..53464d1fcf 100644
--- a/Telegram/PrepareWin.bat
+++ b/Telegram/PrepareWin.bat
@@ -1,6 +1,9 @@
 @echo OFF
 
+set "AppVersionStrSmall=0.6.12"
 set "AppVersionStr=0.6.12"
+set "AppVersionStrFull=0.6.12"
+
 echo.
 echo Preparing version %AppVersionStr%..
 echo.
@@ -14,7 +17,7 @@ if %errorlevel% neq 0 goto error1
 call ..\..\..\TelegramPrivate\Sign.bat Updater.exe
 if %errorlevel% neq 0 goto error1
 
-iscc ..\..\Telegram\Setup.iss
+iscc /dMyAppVersion=%AppVersionStrSmall% /dMyAppVersionZero=%AppVersionStr% /dMyAppFullVersion=%AppVersionStrFull% ..\..\Telegram\Setup.iss
 if %errorlevel% neq 0 goto error1
 
 call ..\..\..\TelegramPrivate\Sign.bat tsetup.%AppVersionStr%.exe
diff --git a/Telegram/Setup.iss b/Telegram/Setup.iss
index 7ea4ed9353..9430e6c86d 100644
--- a/Telegram/Setup.iss
+++ b/Telegram/Setup.iss
@@ -3,9 +3,6 @@
 
 #define MyAppShortName "Telegram"
 #define MyAppName "Telegram Desktop"
-#define MyAppVersion "0.6.12"
-#define MyAppVersionZero "0.6.12"
-#define MyAppFullVersion "0.6.12.0"
 #define MyAppPublisher "Telegram Messenger LLP"
 #define MyAppURL "https://tdesktop.com"
 #define MyAppExeName "Telegram.exe"