diff --git a/compiler/semstmts.nim b/compiler/semstmts.nim
index 713867b766..cd7428b627 100644
--- a/compiler/semstmts.nim
+++ b/compiler/semstmts.nim
@@ -1278,8 +1278,7 @@ proc typeSectionRightSidePass(c: PContext, n: PNode) =
       incl st.flags, tfRefsAnonObj
       let obj = newSym(skType, getIdent(c.cache, s.name.s & ":ObjectType"),
                        nextId c.idgen, getCurrOwner(c), s.info)
-      obj.ast = a.copyTree
-      obj.ast[0] = newSymNode(obj)
+      obj.ast = a
       if sfPure in s.flags:
         obj.flags.incl sfPure
       obj.typ = st.lastSon