1 files changed, 2 insertions, 2 deletions
diff --git a/src/libcollections/btree/set.rs b/src/libcollections/btree/set.rs
index 98f16332170..44140154ae4 100644
--- a/src/libcollections/btree/set.rs
+++ b/src/libcollections/btree/set.rs
@@ -556,11 +556,11 @@ impl<'a, 'b, T: Ord + Clone> BitOr<&'b BTreeSet<T>> for &'a BTreeSet<T> {
 #[stable]
 impl<T: Show> Show for BTreeSet<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        try!(write!(f, "{{"));
+        try!(write!(f, "BTreeSet {{"));
 
         for (i, x) in self.iter().enumerate() {
             if i != 0 { try!(write!(f, ", ")); }
-            try!(write!(f, "{}", *x));
+            try!(write!(f, "{:?}", *x));
         }
 
         write!(f, "}}")