diff --git a/examples/file_info.rs b/examples/file_info.rs
index f9186251..63f7d87e 100644
--- a/examples/file_info.rs
+++ b/examples/file_info.rs
@@ -1,6 +1,7 @@
 extern crate zip;
 
 use std::fs;
+use std::io::BufReader;
 
 fn main() {
     std::process::exit(real_main());
@@ -14,8 +15,9 @@ fn real_main() -> i32 {
     }
     let fname = std::path::Path::new(&*args[1]);
     let file = fs::File::open(&fname).unwrap();
+    let reader = BufReader::new(file);
 
-    let mut archive = zip::ZipArchive::new(file).unwrap();
+    let mut archive = zip::ZipArchive::new(reader).unwrap();
 
     for i in 0..archive.len() {
         let file = archive.by_index(i).unwrap();