diff --git a/compiler/lambdalifting.nim b/compiler/lambdalifting.nim
index c8c5acf974..048b286aae 100644
--- a/compiler/lambdalifting.nim
+++ b/compiler/lambdalifting.nim
@@ -150,6 +150,7 @@ template isIterator*(owner: PSym): bool =
 
 proc createEnvObj(g: ModuleGraph; idgen: IdGenerator; owner: PSym; info: TLineInfo): PType =
   result = createObj(g, idgen, owner, info, final=false)
+  result.flags.incl tfFinal
   if owner.isIterator:
     rawAddField(result, createStateField(g, owner, idgen))