diff --git a/index.js b/index.js
index 9123337..fde1e93 100644
--- a/index.js
+++ b/index.js
@@ -336,12 +336,14 @@ async function fastifyStatic (fastify, opts) {
         })
       }
     } else {
-      const globPattern = '**'
+      const globPattern = '**/**'
       const indexDirs = new Map()
       const routes = new Set()
 
+      const winSeparatorRegex = new RegExp(`\\${path.win32.sep}`, 'g')
+
       for (const rootPath of Array.isArray(sendOptions.root) ? sendOptions.root : [sendOptions.root]) {
-        const files = await glob(path.join(rootPath, globPattern), { follow: true, nodir: true, dot: opts.serveDotFiles })
+        const files = await glob(path.join(rootPath, globPattern).replace(winSeparatorRegex, path.posix.sep), { follow: true, nodir: true, dot: opts.serveDotFiles })
         const indexes = typeof opts.index === 'undefined' ? ['index.html'] : [].concat(opts.index)
 
         for (let file of files) {