diff --git a/src/arraytraits.rs b/src/arraytraits.rs
index da87e3a58..498da0f9c 100644
--- a/src/arraytraits.rs
+++ b/src/arraytraits.rs
@@ -433,6 +433,10 @@ where
 {
 }
 
+unsafe impl<A, D> Sync for ArrayRef<A, D> where A: Sync {}
+
+unsafe impl<A, D> Send for ArrayRef<A, D> where A: Send {}
+
 #[cfg(feature = "serde")]
 #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
 // Use version number so we can add a packed format later.