diff --git a/installer/windows/product.wxs b/installer/windows/product.wxs
index f95b3493..ae346da7 100644
--- a/installer/windows/product.wxs
+++ b/installer/windows/product.wxs
@@ -70,6 +70,7 @@
                     <Directory Id="extensions" Name="extensions">
                         <Component><File Source="$(var.SQLitePath)\math.dll" /></Component>
                         <Component><File Source="$(var.SQLitePath)\formats.dll" /></Component>
+                        <Component><File Source="$(var.SQLitePath)\fileio.dll" /></Component>
                     </Directory>
                     <Directory Id="imageformats" Name="imageformats">
                         <Component><File Source="$(var.QtPath)\plugins\imageformats\qgif.dll" /></Component>
@@ -148,6 +149,9 @@
                 <Feature Id="FormatsExtension" Title="Formats" Description="Provide additional field display formats." AllowAdvertise="no">
                     <ComponentRef Id="formats.dll" />
                 </Feature>
+                <Feature Id="FileioExtension" Title="Fileio" Description="Implements SQL functions readfile(), writefile(), and eponymous virtual type 'fsdir'." AllowAdvertise="no">
+                    <ComponentRef Id="fileio.dll" />
+                </Feature>
             </Feature>
 
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