diff --git a/src/libcore/result.rs b/src/libcore/result.rs
index f4973b3a254ba..e7768106aa6ad 100644
--- a/src/libcore/result.rs
+++ b/src/libcore/result.rs
@@ -807,6 +807,8 @@ impl<T: Default, E> Result<T, E> {
     /// `Err` on error.
     ///
     /// ```
+    /// #![feature(result_unwrap_or_default)]
+    ///
     /// let good_year_from_input = "1909";
     /// let bad_year_from_input = "190blarg";
     /// let good_year = good_year_from_input.parse().unwrap_or_default();
diff --git a/src/libcoretest/lib.rs b/src/libcoretest/lib.rs
index 590bf478aa723..cdbc214731806 100644
--- a/src/libcoretest/lib.rs
+++ b/src/libcoretest/lib.rs
@@ -34,6 +34,7 @@
 #![feature(unique)]
 #![feature(iter_max_by)]
 #![feature(iter_min_by)]
+#![feature(result_unwrap_or_default)]
 
 extern crate core;
 extern crate test;
diff --git a/src/libcoretest/result.rs b/src/libcoretest/result.rs
index f80cb8d520736..bc2cd8bbfc651 100644
--- a/src/libcoretest/result.rs
+++ b/src/libcoretest/result.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(result_unwrap_or_default)]
-
 fn op1() -> Result<isize, &'static str> { Ok(666) }
 fn op2() -> Result<isize, &'static str> { Err("sadface") }