1 files changed, 3 insertions, 0 deletions
diff --git a/core/ops.rs b/core/ops.rs
index 7ed142682..e0bdb0184 100644
--- a/core/ops.rs
+++ b/core/ops.rs
@@ -21,6 +21,9 @@ pub type OpResult<E> = Result<Op<E>, E>;
 pub enum Op<E> {
   Sync(Buf),
   Async(OpAsyncFuture<E>),
+  /// AsyncUnref is the variation of Async, which doesn't block the program
+  /// exiting.
+  AsyncUnref(OpAsyncFuture<E>),
 }
 
 pub type CoreError = ();