diff --git a/bootstrap.bat b/bootstrap.bat
index 876a7638f10..42bc32ba247 100644
--- a/bootstrap.bat
+++ b/bootstrap.bat
@@ -12,7 +12,7 @@ ECHO Building Boost.Build engine
 if exist ".\tools\build\src\engine\b2.exe" del tools\build\src\engine\b2.exe
 pushd tools\build\src\engine
 
-call .\build.bat
+call .\build.bat "%1"
 @ECHO OFF
 
 popd