diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs
index 975b22ffe5db..106a5ed57ea6 100644
--- a/rust/kernel/platform.rs
+++ b/rust/kernel/platform.rs
@@ -565,3 +565,7 @@ unsafe impl Send for Device {}
 // SAFETY: `Device` can be shared among threads because all methods of `Device`
 // (i.e. `Device<Normal>) are thread safe.
 unsafe impl Sync for Device {}
+
+// SAFETY: Same as `Device<Normal>` -- the underlying `struct platform_device` is the same;
+// `Bound` is a zero-sized type-state marker that does not affect thread safety.
+unsafe impl Sync for Device<device::Bound> {}