1 files changed, 1 insertions, 1 deletions

diff --git a/embassy-sync/src/once_lock.rs b/embassy-sync/src/once_lock.rs
index cd05b986d..1e848685a 100644
--- a/embassy-sync/src/once_lock.rs
+++ b/embassy-sync/src/once_lock.rs
@@ -42,7 +42,7 @@ pub struct OnceLock<T> {
     data: Cell<MaybeUninit<T>>,
 }
 
-unsafe impl<T> Sync for OnceLock<T> {}
+unsafe impl<T> Sync for OnceLock<T> where T: Sync {}
 
 impl<T> OnceLock<T> {
     /// Create a new uninitialized `OnceLock`.