diff --git a/src/transport/tests/test_udp.rs b/src/transport/tests/test_udp.rs
index 0f844121..1a9d82a4 100644
--- a/src/transport/tests/test_udp.rs
+++ b/src/transport/tests/test_udp.rs
@@ -86,3 +86,58 @@ async fn test_udp_recv_sip_message() -> Result<()> {
     };
     Ok(())
 }
+
+#[tokio::test]
+async fn test_udp_recv_binary_body_sip_message() -> Result<()> {
+    let peer_bob = UdpConnection::create_connection("127.0.0.1:0".parse()?, None, None).await?;
+    let peer_alice = UdpConnection::create_connection("127.0.0.1:0".parse()?, None, None).await?;
+    let (bob_tx, mut bob_rx) = unbounded_channel();
+
+    let send_loop = async {
+        sleep(Duration::from_millis(20)).await;
+        let mut datagram = b"MESSAGE sip:bob@example.com SIP/2.0\r\n\
+Via: SIP/2.0/UDP 192.0.2.1:5060;branch=z9hG4bK1\r\n\
+CSeq: 1 MESSAGE\r\n\
+Content-Type: application/isup\r\n\
+Content-Length: 3\r\n\r\n"
+            .to_vec();
+        datagram.extend_from_slice(&[0x00, 0x91, 0x01]);
+        assert!(std::str::from_utf8(&datagram).is_err());
+
+        peer_alice
+            .send_raw(&datagram, peer_bob.get_addr())
+            .await
+            .expect("send_raw");
+        sleep(Duration::from_secs(3)).await;
+    };
+
+    select! {
+        _ = peer_bob.serve_loop(bob_tx) => {
+            assert!(false, "bob serve_loop exited");
+        }
+        _ = send_loop => {}
+        event = bob_rx.recv() => {
+            match event {
+                Some(TransportEvent::Incoming(msg, _, from)) => {
+                    assert!(msg.is_request());
+                    assert_eq!(from, peer_alice.get_addr().to_owned());
+                    match msg {
+                        crate::sip::SipMessage::Request(req) => {
+                            assert_eq!(req.body, vec![0x00, 0x91, 0x01]);
+                        }
+                        crate::sip::SipMessage::Response(_) => {
+                            assert!(false, "expected request");
+                        }
+                    }
+                }
+                _ => {
+                    assert!(false, "unexpected event");
+                }
+            }
+        }
+        _= sleep(Duration::from_millis(500)) => {
+            assert!(false, "timeout waiting for binary body message");
+        }
+    };
+    Ok(())
+}
diff --git a/src/transport/udp.rs b/src/transport/udp.rs
index d9bb95a6..5974c173 100644
--- a/src/transport/udp.rs
+++ b/src/transport/udp.rs
@@ -126,39 +126,30 @@ impl UdpConnection {
                 }
             }
 
-            match &buf[..len] {
+            let packet = &buf[..len];
+
+            match packet {
                 KEEPALIVE_REQUEST => {
                     self.inner.conn.send_to(KEEPALIVE_RESPONSE, addr).await.ok();
                     continue;
                 }
                 KEEPALIVE_RESPONSE => continue,
                 _ => {
-                    if buf.iter().all(|&b| b.is_ascii_whitespace()) {
+                    if packet.iter().all(|&b| b.is_ascii_whitespace()) {
                         continue;
                     }
                 }
             }
 
-            let undecoded = match std::str::from_utf8(&buf[..len]) {
-                Ok(s) => s,
-                Err(e) => {
-                    debug!(
-                        src = %addr,
-                        error = %e,
-                        buf = ?&buf[..len],
-                        "decoding text error"
-                    );
-                    continue;
-                }
-            };
+            let raw_message = String::from_utf8_lossy(packet);
 
-            let msg = match crate::sip::SipMessage::try_from(undecoded) {
+            let msg = match crate::sip::SipMessage::try_from(packet) {
                 Ok(msg) => msg,
                 Err(e) => {
                     debug!(
                         src = %addr,
                         error = %e,
-                        raw_message = %undecoded,
+                        raw_message = %raw_message,
                         "error parsing SIP message"
                     );
                     continue;
@@ -175,14 +166,14 @@ impl UdpConnection {
                     debug!(
                         src = %addr,
                         error = ?e,
-                        raw_message = %undecoded,
+                        raw_message = %raw_message,
                         "error updating SIP via"
                     );
                     continue;
                 }
             };
 
-            debug!(len, src=%addr, dest=%self.get_addr(), raw_message=undecoded, "udp received");
+            debug!(len, src=%addr, dest=%self.get_addr(), raw_message = %raw_message, "udp received");
 
             let from = SipAddr {
                 r#type: Some(crate::sip::transport::Transport::Udp),