diff --git a/luisa_compute/src/runtime.rs b/luisa_compute/src/runtime.rs
index 6f699de..e18df9e 100644
--- a/luisa_compute/src/runtime.rs
+++ b/luisa_compute/src/runtime.rs
@@ -510,6 +510,8 @@ pub(crate) enum StreamHandle {
         mutex: RawMutex,
     },
 }
+unsafe impl Send for StreamHandle {}
+unsafe impl Sync for StreamHandle {}
 
 pub(crate) struct SwapchainHandle {
     pub(crate) device: Arc<DeviceHandle>,
@@ -679,6 +681,7 @@ pub struct Scope<'a> {
     resource_tracker: RefCell<ResourceTracker>,
 }
 
+
 impl<'a> Scope<'a> {
     #[inline]
     pub fn handle(&self) -> api::Stream {