diff --git a/src/visitor.rs b/src/visitor.rs
index 96327ef96a7..650bb40ca17 100644
--- a/src/visitor.rs
+++ b/src/visitor.rs
@@ -389,9 +389,9 @@ impl<'a> FmtVisitor<'a> {
                               ti.id,
                               ast::Defaultness::Final);
             }
-            ast::TraitItemKind::Type(ref type_param_bounds, _) => {
+            ast::TraitItemKind::Type(ref type_param_bounds, ref type_default) => {
                 let rewrite = rewrite_associated_type(ti.ident,
-                                                      None,
+                                                      type_default.as_ref(),
                                                       Some(type_param_bounds),
                                                       &self.get_context(),
                                                       self.block_indent);
diff --git a/tests/target/associated_type_defaults.rs b/tests/target/associated_type_defaults.rs
new file mode 100644
index 00000000000..d0a08133725
--- /dev/null
+++ b/tests/target/associated_type_defaults.rs
@@ -0,0 +1,4 @@
+#![feature(associated_type_defaults)]
+trait Foo {
+    type Bar = ();
+}