diff --git a/src/libstd/time.rs b/src/libstd/time.rs
index d59085cd44a..dbec4da24f9 100644
--- a/src/libstd/time.rs
+++ b/src/libstd/time.rs
@@ -216,7 +216,7 @@ impl Instant {
     }
 
     /// Returns the amount of time elapsed from another instant to this one,
-    /// or None if that instant is earlier than this one.
+    /// or None if that instant is later than this one.
     ///
     /// # Examples
     ///