diff --git a/src/send.rs b/src/send.rs
index 3b01cb5..d927d98 100644
--- a/src/send.rs
+++ b/src/send.rs
@@ -247,6 +247,7 @@ pub(crate) trait SendLoop: Sync {
 					.iter()
 					.map(|(prio, i)| i.dump(*prio))
 					.collect::<Vec<_>>()
+					.join(" ; ")
 			);
 
 			let recv_fut = async {