1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/ffi/c_str.rs b/src/libstd/ffi/c_str.rs
index 42ea50bff77..de91e5f3268 100644
--- a/src/libstd/ffi/c_str.rs
+++ b/src/libstd/ffi/c_str.rs
@@ -241,7 +241,7 @@ impl fmt::Display for NulError {
 impl From<NulError> for io::Error {
     fn from(_: NulError) -> io::Error {
         io::Error::new(io::ErrorKind::InvalidInput,
-                       "data provided contains a nul byte", None)
+                       "data provided contains a nul byte")
     }
 }