1 files changed, 3 insertions, 1 deletions
diff --git a/src/test/ui/write-fmt-errors.rs b/src/test/ui/write-fmt-errors.rs
index 7dd98564425..afbe4e3b2ce 100644
--- a/src/test/ui/write-fmt-errors.rs
+++ b/src/test/ui/write-fmt-errors.rs
@@ -1,5 +1,7 @@
 // run-pass
 
+#![feature(io_error_unknown)]
+
 use std::fmt;
 use std::io::{self, Error, Write, sink};
 
@@ -13,7 +15,7 @@ impl fmt::Display for ErrorDisplay {
 
 struct ErrorWriter;
 
-const FORMAT_ERROR: io::ErrorKind = io::ErrorKind::Other;
+const FORMAT_ERROR: io::ErrorKind = io::ErrorKind::Unknown;
 const WRITER_ERROR: io::ErrorKind = io::ErrorKind::NotConnected;
 
 impl Write for ErrorWriter {