diff --git a/crates/renderer/src/device.rs b/crates/renderer/src/device.rs
index e110677..c1fad2b 100644
--- a/crates/renderer/src/device.rs
+++ b/crates/renderer/src/device.rs
@@ -481,6 +481,16 @@ impl core::ops::Deref for Device {
     }
 }
 
+impl<T> AsRef<T> for Device
+where
+    T: ?Sized,
+    <Self as Deref>::Target: AsRef<T>,
+{
+    fn as_ref(&self) -> &T {
+        self.deref().as_ref()
+    }
+}
+
 impl DeviceInner {
     pub fn sync_threadpool(&self) -> &sync::SyncThreadpool {
         &self.sync_threadpool
@@ -749,6 +759,8 @@ impl<T: DeviceHandle> Drop for DeviceObject<T> {
 }
 
 pub trait DeviceHandle {
+    /// # Safety
+    /// The caller must ensure this function is only called once for a given object.
     unsafe fn destroy(&mut self, device: &Device);
 }
 
@@ -779,11 +791,9 @@ impl DeviceHandle for vk::Buffer {
 impl DeviceHandle for vk::SwapchainKHR {
     unsafe fn destroy(&mut self, device: &Device) {
         unsafe {
-            device
-                .device_extensions
-                .swapchain
-                .as_ref()
-                .map(|swapchain| swapchain.destroy_swapchain(*self, None));
+            if let Some(swapchain) = device.device_extensions.swapchain.as_ref() {
+                swapchain.destroy_swapchain(*self, None)
+            }
         }
     }
 }