1 files changed, 2 insertions, 1 deletions
diff --git a/test/files/pos/bug247.scala b/test/files/pos/bug247.scala
index bfd9d9694f..e2655c6ab3 100644
--- a/test/files/pos/bug247.scala
+++ b/test/files/pos/bug247.scala
@@ -16,10 +16,11 @@ class Tree[KEY,Entry](order:Order[KEY]) {
   def size =0;
 }
 
-class TreeMap[KEY,VALUE](_factory:TreeMapFactory[KEY]) extends Tree[KEY,Pair[KEY,VALUE]](_factory.order) with Map[KEY, VALUE] {
+class TreeMap[KEY,VALUE](_factory:TreeMapFactory[KEY]) extends Tree[KEY,Pair[KEY,VALUE]](_factory.order) with scala.collection.DefaultMap[KEY, VALUE] with Map[KEY, VALUE] {
   val factory = _factory
   val order = _factory.order;
   def this(newOrder:Order[KEY]) = this(new TreeMapFactory[KEY](newOrder));
   def get(key:KEY) = null;
   def elements:Iterator[Pair[KEY,VALUE]] = null;
+  override def size = super[Tree].size
 }