1 files changed, 10 insertions, 0 deletions
diff --git a/src/libstd/io/util.rs b/src/libstd/io/util.rs
index b09161b97aa..b9d5dc27db0 100644
--- a/src/libstd/io/util.rs
+++ b/src/libstd/io/util.rs
@@ -180,6 +180,11 @@ impl Read for Repeat {
     }
 
     #[inline]
+    fn is_read_vectored(&self) -> bool {
+        true
+    }
+
+    #[inline]
     unsafe fn initializer(&self) -> Initializer {
         Initializer::nop()
     }
@@ -236,6 +241,11 @@ impl Write for Sink {
     }
 
     #[inline]
+    fn is_write_vectored(&self) -> bool {
+        true
+    }
+
+    #[inline]
     fn flush(&mut self) -> io::Result<()> {
         Ok(())
     }