diff --git a/src/jingle_ice_udp.rs b/src/jingle_ice_udp.rs
index 5713c2e..8cb47da 100644
--- a/src/jingle_ice_udp.rs
+++ b/src/jingle_ice_udp.rs
@@ -74,7 +74,7 @@ generate_element!(
         protocol: Required<String> = "protocol",
 
         /// A related address as defined in ICE-CORE.
-        rel_addr: Option<String> = "rel-addr",
+        rel_addr: Option<IpAddr> = "rel-addr",
 
         /// A related port as defined in ICE-CORE.
         rel_port: Option<u16> = "rel-port",