diff --git a/src/future.rs b/src/future.rs
index d7f4cc7..402897e 100644
--- a/src/future.rs
+++ b/src/future.rs
@@ -15,7 +15,7 @@
 //! # });
 //! ```
 
-#[cfg(feature = "alloc")]
+#[cfg(all(not(feature = "std"), feature = "alloc"))]
 extern crate alloc;
 
 #[doc(no_inline)]
@@ -35,7 +35,7 @@ use std::{
 #[cfg(feature = "race")]
 use fastrand::Rng;
 
-#[cfg(feature = "alloc")]
+#[cfg(all(not(feature = "std"), feature = "alloc"))]
 use alloc::boxed::Box;
 use core::task::{Context, Poll};
 
diff --git a/src/stream.rs b/src/stream.rs
index bf78458..6be35d2 100644
--- a/src/stream.rs
+++ b/src/stream.rs
@@ -15,13 +15,13 @@
 //! # });
 //! ```
 
-#[cfg(feature = "alloc")]
+#[cfg(all(not(feature = "std"), feature = "alloc"))]
 extern crate alloc;
 
 #[doc(no_inline)]
 pub use futures_core::stream::Stream;
 
-#[cfg(feature = "alloc")]
+#[cfg(all(not(feature = "std"), feature = "alloc"))]
 use alloc::boxed::Box;
 
 use core::fmt;