diff --git a/src/libstd/time/duration.rs b/src/libstd/time/duration.rs
index ad1be82d6d8..7ecb3920cc8 100644
--- a/src/libstd/time/duration.rs
+++ b/src/libstd/time/duration.rs
@@ -40,7 +40,7 @@ const MILLIS_PER_SEC: u64 = 1_000;
 /// let ten_millis = Duration::from_millis(10);
 /// ```
 #[stable(feature = "duration", since = "1.3.0")]
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug)]
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 pub struct Duration {
     secs: u64,
     nanos: u32, // Always 0 <= nanos < NANOS_PER_SEC