diff --git a/lib/rs/src/lib.rs b/lib/rs/src/lib.rs
index a36ec99..cdd60f0 100644
--- a/lib/rs/src/lib.rs
+++ b/lib/rs/src/lib.rs
@@ -47,6 +47,7 @@
 
 #![crate_type = "lib"]
 #![doc(test(attr(allow(unused_variables), deny(warnings))))]
+#![deny(bare_trait_objects)]
 
 extern crate byteorder;
 extern crate ordered_float;