diff --git a/darkhttpd.c b/darkhttpd.c
index c69040a..350a56a 100644
--- a/darkhttpd.c
+++ b/darkhttpd.c
@@ -1987,6 +1987,8 @@ static void generate_dir_listing(struct connection *conn, const char *path,
 
         append(listing, "<a href=\"");
         append(listing, safe_url);
+        if (list[i]->is_dir)
+            append(listing, "/");
         append(listing, "\">");
         append_escaped(listing, list[i]->name);
         append(listing, "</a>");