diff --git a/Cargo.toml b/Cargo.toml
index e1bab54..e95ab30 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "try-lock"
-version = "0.2.3" # remember to update html_root_url
+version = "0.2.4" # remember to update html_root_url
 description = "A lightweight atomic lock."
 keywords = ["lock", "atomic"]
 categories = ["concurrency", "no-std"]
diff --git a/src/lib.rs b/src/lib.rs
index bf15558..e0e46b4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -51,6 +51,7 @@ use core::cell::UnsafeCell;
 use core::fmt;
 use core::ops::{Deref, DerefMut};
 use core::sync::atomic::{AtomicBool, Ordering};
+use core::marker::PhantomData;
 
 /// A light-weight lock guarded by an atomic boolean.
 ///
@@ -167,6 +168,7 @@ impl<T> TryLock<T> {
             Some(Locked {
                 lock: self,
                 order: unlock_order,
+                _p: PhantomData,
             })
         } else {
             None
@@ -216,6 +218,8 @@ impl<T: fmt::Debug> fmt::Debug for TryLock<T> {
 pub struct Locked<'a, T: 'a> {
     lock: &'a TryLock<T>,
     order: Ordering,
+    /// Suppresses Send and Sync autotraits for `struct Locked`.
+    _p: PhantomData<*mut T>,
 }
 
 impl<'a, T> Deref for Locked<'a, T> {