diff --git a/src/constants.rs b/src/constants.rs
index 0071f6b9..29a7dc3e 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,6 +1,5 @@
 //! Library level constants
-
-extern crate mio;
+use mio;
 
 /// MIO token used to distinguish system events
 /// from other event sources.