diff --git a/src/libcollections/btree/mod.rs b/src/libcollections/btree/mod.rs
index a235021e6396b..d424cb7e29d2b 100644
--- a/src/libcollections/btree/mod.rs
+++ b/src/libcollections/btree/mod.rs
@@ -12,6 +12,7 @@ mod node;
 pub mod map;
 pub mod set;
 
+#[doc(hidden)]
 trait Recover<Q: ?Sized> {
     type Key;