diff --git a/src/lib.rs b/src/lib.rs
index fc4dd1d..7847716 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,6 +24,7 @@ struct InnerStarReference {
     header_view: HeaderView,
 }
 
+unsafe impl Send for InnerStarReference {}
 unsafe impl Sync for InnerStarReference {}
 
 impl Drop for InnerStarReference {
diff --git a/star-sys/src/lib.rs b/star-sys/src/lib.rs
index 2e2d2e5..1b7ba06 100644
--- a/star-sys/src/lib.rs
+++ b/star-sys/src/lib.rs
@@ -6,8 +6,6 @@ pub struct StarRef {
     _unused: [u8; 0],
 }
 
-unsafe impl Send for StarRef {}
-
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct Aligner {