diff --git a/CHANGELOG.md b/CHANGELOG.md
index c5d86e4..e0183a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 * [breaking] The control pipe is now provided in the `UsbDeviceBuilder` API to allow for user-provided control
 pipes. This makes it so that control pipes have configurable sizing.
+* Don't require UsbBus to be Sync. If a UsbBus is not Sync, it can still be used to make a UsbDevice, but that UsbDevice will not be Sync (ensuring soundness).
 
 ## [0.3.2] - 2024-03-06
 
diff --git a/src/bus.rs b/src/bus.rs
index 398b192..5c6af03 100644
--- a/src/bus.rs
+++ b/src/bus.rs
@@ -17,7 +17,7 @@ use portable_atomic::{AtomicPtr, Ordering};
 /// take place before [`enable`](UsbBus::enable) is called. After the bus is enabled, in practice
 /// most access won't mutate the object itself but only endpoint-specific registers and buffers, the
 /// access to which is mostly arbitrated by endpoint handles.
-pub trait UsbBus: Sync + Sized {
+pub trait UsbBus: Sized {
     /// Allocates an endpoint and specified endpoint parameters. This method is called by the device
     /// and class implementations to allocate endpoints, and can only be called before
     /// [`enable`](UsbBus::enable) is called.