diff --git a/tools/antipede/bin/ant.bat b/tools/antipede/bin/ant.bat
index 8c261ad53..96e1463d4 100644
--- a/tools/antipede/bin/ant.bat
+++ b/tools/antipede/bin/ant.bat
@@ -94,11 +94,11 @@ echo.
 if not "%JIKESPATH%" == "" goto runAntWithJikes
 
 :runAnt
-"%_JAVACMD%" -classpath "%LOCALCLASSPATH%" -Dant.home="%ANT_HOME%" %ANT_OPTS% org.apache.tools.ant.Main %ANT_ARGS% %ANT_CMD_LINE_ARGS%
+"%_JAVACMD%" -mx128m -classpath "%LOCALCLASSPATH%" -Dant.home="%ANT_HOME%" %ANT_OPTS% org.apache.tools.ant.Main %ANT_ARGS% %ANT_CMD_LINE_ARGS%
 goto end
 
 :runAntWithJikes
-"%_JAVACMD%" -classpath "%LOCALCLASSPATH%" -Dant.home="%ANT_HOME%" -Djikes.class.path="%JIKESPATH%" %ANT_OPTS% org.apache.tools.ant.Main %ANT_ARGS% %ANT_CMD_LINE_ARGS%
+"%_JAVACMD%" -mx128m -classpath "%LOCALCLASSPATH%" -Dant.home="%ANT_HOME%" -Djikes.class.path="%JIKESPATH%" %ANT_OPTS% org.apache.tools.ant.Main %ANT_ARGS% %ANT_CMD_LINE_ARGS%
 
 :end
 set LOCALCLASSPATH=