diff --git a/tokio-executor/src/park.rs b/tokio-executor/src/park.rs
index 00deb1e67..05ed58d52 100644
--- a/tokio-executor/src/park.rs
+++ b/tokio-executor/src/park.rs
@@ -46,6 +46,7 @@
 
 use std::marker::PhantomData;
 use std::rc::Rc;
+use std::sync::Arc;
 use std::time::Duration;
 
 use crossbeam_utils::sync::{Parker, Unparker};