diff --git a/wxBuild_wxWidgets.bat b/wxBuild_wxWidgets.bat
index d76af4e..d5fe39d 100644
--- a/wxBuild_wxWidgets.bat
+++ b/wxBuild_wxWidgets.bat
@@ -1006,4 +1006,5 @@ set COMPILER_NAME=
 set COMPILER_ARCH=
 set BAKE_FORMAT=
 set BAKE_OPTIONS_FILE=
+set OLDDIR=
 ENDLOCAL