diff --git a/src/lib.rs b/src/lib.rs
index 74a1d8e..85e62e6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,5 @@
+#![feature(crate_visibility_modifier)]
+
 #[macro_use] extern crate failure;
 
 use lazy_static::lazy_static;