diff --git a/misc/windows/rio.wxs b/misc/windows/rio.wxs
index faa7e1fe..ae5dce75 100644
--- a/misc/windows/rio.wxs
+++ b/misc/windows/rio.wxs
@@ -49,7 +49,7 @@
       <!-- Add context menu -->
       <Component Id="ContextMenu" Guid="449f9121-f7b9-41fe-82da-52349ea8ff91" Directory="TARGETDIR">
          <RegistryKey Root="HKCU" Key="Software\Classes\Directory\Background\shell\Open Rio here\command">
-            <RegistryValue Type="string" Value='[RioProgramFiles]rio.exe --working-directory "%v"' KeyPath="yes" />
+            <RegistryValue Type="string" Value='[RioProgramFiles]rio.exe --working-dir "%v"' KeyPath="yes" />
          </RegistryKey>
          <RegistryKey Root="HKCU" Key="Software\Classes\Directory\Background\shell\Open Rio here">
             <RegistryValue Type="string" Name="Icon" Value="[RioProgramFiles]rio.exe" />