1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstd/vec_ng.rs b/src/libstd/vec_ng.rs
index 9b6acdd9b9e..0dc17435fbe 100644
--- a/src/libstd/vec_ng.rs
+++ b/src/libstd/vec_ng.rs
@@ -350,6 +350,7 @@ impl<T> Vec<T> {
     }
 
     #[inline]
+    #[deprecated="Use `xs.iter().map(closure)` instead."]
     pub fn map<U>(&self, f: |t: &T| -> U) -> Vec<U> {
         self.iter().map(f).collect()
     }