diff --git a/src/libstd/sys/unix/l4re.rs b/src/libstd/sys/unix/l4re.rs
index b9e725371a36..b3dd1cf6aaac 100644
--- a/src/libstd/sys/unix/l4re.rs
+++ b/src/libstd/sys/unix/l4re.rs
@@ -292,6 +292,10 @@ pub fn socket(&self) -> &Socket { &self.inner }
 
         pub fn into_socket(self) -> Socket { self.inner }
 
+        pub fn peer_addr(&self) -> io::Result<SocketAddr> {
+            unimpl!();
+        }
+
         pub fn socket_addr(&self) -> io::Result<SocketAddr> {
             unimpl!();
         }
@@ -463,4 +467,3 @@ fn try_from(_v: (&'a str, u16)) -> io::Result<LookupHost> {
         }
     }
 }
-