diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index 5f94bb4a56f46755583011bae1afd2ce468e668b..271bc967bc9bc1021d1a0bf1692d5419ae75fb74 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -480,7 +480,6 @@ fn clean(&self, cx: &DocContext) -> Item {
         items.extend(self.traits.iter().map(|x| x.clean(cx)));
         items.extend(self.impls.iter().flat_map(|x| x.clean(cx)));
         items.extend(self.macros.iter().map(|x| x.clean(cx)));
-        items.extend(self.def_traits.iter().map(|x| x.clean(cx)));
 
         // determine if we should display the inner contents or
         // the outer `mod` item for the source code.
diff --git a/src/librustdoc/doctree.rs b/src/librustdoc/doctree.rs
index b5c173b15d6d8f5099e4400a806b7396a1cea722..776ec7f409c4488910a2187a3be0161cb3e31660 100644
--- a/src/librustdoc/doctree.rs
+++ b/src/librustdoc/doctree.rs
@@ -72,7 +72,6 @@ pub fn new(name: Option<Name>) -> Module {
             constants  : Vec::new(),
             traits     : Vec::new(),
             impls      : Vec::new(),
-            def_traits : Vec::new(),
             foreigns   : Vec::new(),
             macros     : Vec::new(),
             is_crate   : false,