diff --git a/windows/build/build.cmd b/windows/build/build.cmd
index 5d09596..549e677 100644
--- a/windows/build/build.cmd
+++ b/windows/build/build.cmd
@@ -83,7 +83,7 @@ REM Repacking patched files
 
 REM Removing temporary files
 rmdir /S /Q ..\Firefox\App\tmp
-rm ..\Firefox\App\Firefox\omni.ja.bak
+del ..\Firefox\App\Firefox\omni.ja.bak
 echo OK!
 
 echo.