1 files changed, 3 insertions, 1 deletions
diff --git a/src/library/scala/collection/mutable/LazyBuilder.scala b/src/library/scala/collection/mutable/LazyBuilder.scala
index ebee38b77f..f0a5e6971a 100644
--- a/src/library/scala/collection/mutable/LazyBuilder.scala
+++ b/src/library/scala/collection/mutable/LazyBuilder.scala
@@ -13,12 +13,14 @@ package mutable
 /** A builder that constructs its result lazily. Iterators or iterables to
  *  be added to this builder with `++=` are not evaluated until `result` is called.
  *
+ *  This builder can be reused.
+ *
  *  @since 2.8
  *
  *  @tparam Elem    type of the elements for this builder.
  *  @tparam To      type of the collection this builder builds.
  */
-abstract class LazyBuilder[Elem, +To] extends Builder[Elem, To] {
+abstract class LazyBuilder[Elem, +To] extends ReusableBuilder[Elem, To] {
   /** The different segments of elements to be added to the builder, represented as iterators */
   protected var parts = new ListBuffer[TraversableOnce[Elem]]
   def +=(x: Elem): this.type = { parts += List(x); this }