diff --git a/examples/mustache_cli.ml b/examples/mustache_cli.ml
index 0c7a38f..f4f1310 100644
--- a/examples/mustache_cli.ml
+++ b/examples/mustache_cli.ml
@@ -10,7 +10,7 @@ let load_file f =
   let s = Bytes.create n in
   really_input ic s 0 n;
   close_in ic;
-  (s)
+  (Bytes.to_string s)
 
 let run json_filename template_filename =
   let j = load_file json_filename