diff --git a/commons/zenoh-codec/src/core/timestamp.rs b/commons/zenoh-codec/src/core/timestamp.rs
index 3ec059ae1b..95149144dd 100644
--- a/commons/zenoh-codec/src/core/timestamp.rs
+++ b/commons/zenoh-codec/src/core/timestamp.rs
@@ -23,7 +23,8 @@ use crate::{LCodec, RCodec, WCodec, Zenoh080};
 
 impl LCodec<&Timestamp> for Zenoh080 {
     fn w_len(self, x: &Timestamp) -> usize {
-        self.w_len(x.get_time().as_u64()) + self.w_len(x.get_id().size())
+        let id = x.get_id();
+        self.w_len(x.get_time().as_u64()) + self.w_len(&id.to_le_bytes()[..id.size()])
     }
 }