diff --git a/datastore/memoryds.nim b/datastore/memoryds.nim
index 0ba3712..e300fee 100644
--- a/datastore/memoryds.nim
+++ b/datastore/memoryds.nim
@@ -125,5 +125,5 @@ method close*(self: MemoryDatastore): Future[?!void] {.async.} =
   return success()
 
 func new*(tp: typedesc[MemoryDatastore]): MemoryDatastore =
-  var self = default(tp)
+  var self = tp()
   return self