diff --git a/futures/src/lib.rs b/futures/src/lib.rs
index c25c0853..79178931 100644
--- a/futures/src/lib.rs
+++ b/futures/src/lib.rs
@@ -16,3 +16,31 @@ pub use command::Command;
 pub use executor::Executor;
 pub use runtime::Runtime;
 pub use subscription::Subscription;
+
+/// A boxed static future.
+///
+/// - On native platforms, it needs a `Send` requirement.
+/// - On the Web platform, it does not need a `Send` requirement.
+#[cfg(not(target_arch = "wasm32"))]
+pub type BoxFuture<T> = futures::future::BoxFuture<'static, T>;
+
+/// A boxed static future.
+///
+/// - On native platforms, it needs a `Send` requirement.
+/// - On the Web platform, it does not need a `Send` requirement.
+#[cfg(target_arch = "wasm32")]
+pub type BoxFuture<T> = futures::future::LocalBoxFuture<'static, T>;
+
+/// A boxed static stream.
+///
+/// - On native platforms, it needs a `Send` requirement.
+/// - On the Web platform, it does not need a `Send` requirement.
+#[cfg(not(target_arch = "wasm32"))]
+pub type BoxStream<T> = futures::stream::BoxStream<'static, T>;
+
+/// A boxed static stream.
+///
+/// - On native platforms, it needs a `Send` requirement.
+/// - On the Web platform, it does not need a `Send` requirement.
+#[cfg(target_arch = "wasm32")]
+pub type BoxStream<T> = futures::stream::LocalBoxStream<'static, T>;