diff --git a/build.bat b/build.bat
index 98d535705..512ee745b 100755
--- a/build.bat
+++ b/build.bat
@@ -7,9 +7,10 @@ if exist bootstrap\lib\ant.jar if exist bootstrap\bin\ant.bat if exist bootstrap
 call bootstrap.bat
 
 :runAnt
-set LOCALCLASSPATH=lib\parser.jar;lib\jaxp.jar
+set LOCALCLASSPATH=lib\parser.jar;lib\jaxp.jar;bootstrap\lib\ant.jar
 for %%i in (lib\optional\*.jar) do call bootstrap\bin\lcp.bat "%%i"
 set CLASSPATH=%LOCALCLASSPATH%;%CLASSPATH%
+set LOCALCLASSPATH=
 
 if not "%REAL_ANT_HOME%" == "" goto install_ant
 call bootstrap\bin\ant.bat %1 %2 %3 %4 %5 %6 %7 %8 %9