diff --git a/.changeset/quiet-crews-tickle.md b/.changeset/quiet-crews-tickle.md
new file mode 100644
index 0000000..0167f2e
--- /dev/null
+++ b/.changeset/quiet-crews-tickle.md
@@ -0,0 +1,5 @@
+---
+"vite-plugin-static-copy": patch
+---
+
+don't crash when the requested path is mapped to a directory
diff --git a/src/middleware.ts b/src/middleware.ts
index 2bd5366..599c133 100644
--- a/src/middleware.ts
+++ b/src/middleware.ts
@@ -262,7 +262,7 @@ export function serveStaticCopyMiddleware(
 
     try {
       const data = viaLocal(root, publicDir, fileMap, pathname)
-      if (!data) {
+      if (!data || data.stats.isDirectory()) {
         return404(res, next)
         return
       }