diff --git a/src/lib.rs b/src/lib.rs
index 645f0b2..f8e7fbd 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -76,6 +76,7 @@
     html_logo_url = "https://raw.githubusercontent.com/smol-rs/smol/master/assets/images/logo_fullsize_transparent.png"
 )]
 
+#[cfg(not(feature = "std"))]
 extern crate alloc;
 
 #[cfg_attr(feature = "std", path = "std.rs")]