diff --git a/client/service/src/lib.rs b/client/service/src/lib.rs
index 834ad403e8d38..5be93c07597f3 100644
--- a/client/service/src/lib.rs
+++ b/client/service/src/lib.rs
@@ -324,7 +324,10 @@ impl<TBl, TCl, TSc, TNetStatus, TNet, TTxPool, TOc> Future for
 		}
 
 		while let Poll::Ready(Some(task_to_spawn)) = Pin::new(&mut this.to_spawn_rx).poll_next(cx) {
+			#[cfg(not(target_os = "unknown"))]
 			tokio::spawn(task_to_spawn);
+			#[cfg(target_os = "unknown")]
+			this.to_poll.push(task_to_spawn);
 		}
 
 		// Polling all the `to_poll` futures.