diff --git a/app/gui/qt/win-build-app.bat b/app/gui/qt/win-build-app.bat
index 50b021a979f1c35c7864192880476b9e57519792..59c6b21de4edde42342696aeae3ba99210ab3986 100644
--- a/app/gui/qt/win-build-app.bat
+++ b/app/gui/qt/win-build-app.bat
@@ -1,7 +1,7 @@
 cd %~dp0
 
 copy /Y ruby_help.tmpl ruby_help.h
-ruby ../../server/bin/qt-doc.rb -o ruby_help.h
+..\..\server\native\windows\bin\ruby ../../server/bin/qt-doc.rb -o ruby_help.h
 @IF ERRORLEVEL==9009 goto :noruby
 
 lrelease SonicPi.pro