1 files changed, 3 insertions, 1 deletions
diff --git a/src/transaction/mod.rs b/src/transaction/mod.rs
index 601b134..3368c47 100644
--- a/src/transaction/mod.rs
+++ b/src/transaction/mod.rs
@@ -2,7 +2,7 @@ pub mod auth;
 
 use crate::{
     encoding::{
-        headers::{CSeq, CallID},
+        headers::{CSeq, CallID, ContentLength},
         request::Request,
         response::Response,
         Message,
@@ -66,6 +66,7 @@ impl<T: Transport> TransactionUser<T> {
                 .get::<CallID>()
                 .ok_or(anyhow!("call-id is mandatory"))??,
         );
+        resp.headers.insert(ContentLength(resp.body.len()));
         self.transport.send(Message::Response(resp)).await?;
         Ok(())
     }
@@ -74,6 +75,7 @@ impl<T: Transport> TransactionUser<T> {
         let seq = self.sequence.fetch_add(1, Ordering::Relaxed);
         let cseq = CSeq(seq, request.method);
         request.headers.insert(cseq);
+        request.headers.insert(ContentLength(request.body.len()));
 
         let (tx, rx) = channel(4);