diff --git a/build/script/win_docs.bat b/build/script/win_docs.bat
index b5981d4a1c..ae2d481f3e 100644
--- a/build/script/win_docs.bat
+++ b/build/script/win_docs.bat
@@ -77,6 +77,7 @@ move in\*.pdf docs\pdf
 zip wxWidgets-%WXW_VER%-PDF.ZIP docs\pdf\*.pdf
 
 rem copy chm to inno
+cd %WXWIN%
 mkdir c:\wx\inno\wxWidgets\docs\htmlhelp
 copy docs\htmlhelp\wx.chm \wx\inno\wxWidgets\docs\htmlhelp\wx.chm
 cd %WXWIN%\build\script