2 files changed, 4 insertions, 4 deletions
diff --git a/src/libstd/sys/common/net2.rs b/src/libstd/sys/common/net2.rs
index e787442052d..7d42d65d360 100644
--- a/src/libstd/sys/common/net2.rs
+++ b/src/libstd/sys/common/net2.rs
@@ -75,7 +75,7 @@ fn sockaddr_to_addr(storage: &libc::sockaddr_storage,
             })))
         }
         _ => {
-            Err(Error::new(ErrorKind::InvalidInput, "invalid argument", None))
+            Err(Error::new(ErrorKind::InvalidInput, "invalid argument"))
         }
     }
 }
@@ -158,8 +158,7 @@ pub fn lookup_addr(addr: &IpAddr) -> io::Result<String> {
     match from_utf8(data.to_bytes()) {
         Ok(name) => Ok(name.to_string()),
         Err(_) => Err(io::Error::new(io::ErrorKind::Other,
-                                     "failed to lookup address information",
-                                     Some("invalid host name".to_string())))
+                                     "failed to lookup address information"))
     }
 }
 
diff --git a/src/libstd/sys/unix/net.rs b/src/libstd/sys/unix/net.rs
index 00b907ce10c..908136a42ab 100644
--- a/src/libstd/sys/unix/net.rs
+++ b/src/libstd/sys/unix/net.rs
@@ -35,7 +35,8 @@ pub fn cvt_gai(err: c_int) -> io::Result<()> {
             .to_string()
     };
     Err(io::Error::new(io::ErrorKind::Other,
-                       "failed to lookup address information", Some(detail)))
+                       &format!("failed to lookup address information: {}",
+                                detail)[..]))
 }
 
 impl Socket {