diff --git a/strategy/src/lib.rs b/strategy/src/lib.rs
index 756b59e..027f202 100644
--- a/strategy/src/lib.rs
+++ b/strategy/src/lib.rs
@@ -417,6 +417,7 @@ pub struct Ready {
     _private: (),
 }
 
+#[cfg(feature = "std")]
 impl Future for Ready {
     type Output = ();