diff --git a/src/lib.rs b/src/lib.rs
index e9d21c5..560c290 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -115,7 +115,7 @@ impl JocalService {
         let socket = UdpSocket::bind(addr).await?;
         socket.set_multicast_loop_v4(false)?;
         socket.set_multicast_ttl_v4(1)?; // local subnet only
-        socket.join_multicast_v4(MULTICAST_IP, config.local_ip_addr)?;
+        socket.join_multicast_v4(MULTICAST_IP, *addr.ip())?;
 
         let client = reqwest::ClientBuilder::new()
             // localsend certs are self-signed