diff --git a/src/libstd/time/mod.rs b/src/libstd/time/mod.rs
index 40113d164df5..839d2188f3d0 100644
--- a/src/libstd/time/mod.rs
+++ b/src/libstd/time/mod.rs
@@ -33,10 +33,10 @@
 
 mod duration;
 
-/// A measurement of a monotonically increasing clock.
+/// A measurement of a monotonically nondecreasing clock.
 /// Opaque and useful only with `Duration`.
 ///
-/// Instants are always guaranteed to be greater than any previously measured
+/// Instants are always guaranteed to no less than any previously measured
 /// instant when created, and are often useful for tasks such as measuring
 /// benchmarks or timing how long an operation takes.
 ///