diff --git a/src/async_flag.rs b/src/async_flag.rs
index 6f776f5..9f32df0 100644
--- a/src/async_flag.rs
+++ b/src/async_flag.rs
@@ -106,6 +106,7 @@ macro_rules! impl_notify {
         }
 
         /// A wake up handle to [`AsyncFlag`].
+        #[derive(Debug, Clone)]
         pub struct AsyncFlagHandle {
             flag: AsyncFlagImpl,
         }