1 files changed, 7 insertions, 0 deletions
diff --git a/src/libstd/unit.rs b/src/libstd/unit.rs
index 3aa3e020500..b23dafbca69 100644
--- a/src/libstd/unit.rs
+++ b/src/libstd/unit.rs
@@ -14,6 +14,7 @@
 use default::Default;
 #[cfg(not(test))]
 use cmp::{Eq, Equal, Ord, Ordering, TotalEq, TotalOrd};
+use fmt;
 
 #[cfg(not(test))]
 impl Eq for () {
@@ -46,3 +47,9 @@ impl Default for () {
     #[inline]
     fn default() -> () { () }
 }
+
+impl fmt::Show for () {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.pad("()")
+    }
+}