diff --git a/src/libtime/lib.rs b/src/libtime/lib.rs
index 1ffe4d3cbadc4..87a87641fc03b 100644
--- a/src/libtime/lib.rs
+++ b/src/libtime/lib.rs
@@ -8,7 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+//! Simple time handling.
+
 #![crate_id = "time#0.11.0-pre"]
+
 #![crate_type = "rlib"]
 #![crate_type = "dylib"]
 #![license = "MIT/ASL2"]