diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs
index f618ba45582e3..d5afd069d7f29 100644
--- a/src/libstd/macros.rs
+++ b/src/libstd/macros.rs
@@ -210,7 +210,8 @@ macro_rules! eprintln {
     })
 }
 
-/// Prints the value of a given expression for quick and dirty debugging.
+/// Prints and returns the value of a given expression for quick and dirty
+/// debugging.
 ///
 /// An example:
 ///