diff --git a/wgpu-core/src/device/mod.rs b/wgpu-core/src/device/mod.rs
index 4054a37d88..fd44392905 100644
--- a/wgpu-core/src/device/mod.rs
+++ b/wgpu-core/src/device/mod.rs
@@ -70,6 +70,7 @@ pub fn all_image_stages() -> hal::pso::PipelineStage {
         | Ps::TRANSFER
 }
 
+#[repr(C)]
 #[derive(Clone, Copy, Debug, PartialEq)]
 #[cfg_attr(feature = "trace", derive(serde::Serialize))]
 #[cfg_attr(feature = "replay", derive(serde::Deserialize))]
diff --git a/wgpu-core/src/resource.rs b/wgpu-core/src/resource.rs
index 78d99bffe9..f88fa22114 100644
--- a/wgpu-core/src/resource.rs
+++ b/wgpu-core/src/resource.rs
@@ -104,6 +104,7 @@ unsafe impl<B: hal::Backend> Sync for BufferMapState<B> {}
 
 pub type BufferMapCallback = unsafe extern "C" fn(status: BufferMapAsyncStatus, userdata: *mut u8);
 
+#[repr(C)]
 #[derive(Debug)]
 pub struct BufferMapOperation {
     pub host: crate::device::HostMap,