diff --git a/projects/apis/metal/src/devices/metal_output_device.m b/projects/apis/metal/src/devices/metal_output_device.m
index caa7274..40d7de7 100644
--- a/projects/apis/metal/src/devices/metal_output_device.m
+++ b/projects/apis/metal/src/devices/metal_output_device.m
@@ -10,7 +10,7 @@ gnReturnCode createMetalOutputDevice(gnInstanceHandle instance, gnOutputDeviceHa
     if (instance == GN_NULL_HANDLE) return GN_INVALID_HANDLE;
 
     outputDevice->outputDevice = malloc(sizeof(gnPlatformOutputDevice));
-    outputDevice->outputDevice->device = deviceInfo.physicalDevice->physicalDevice->device.retain;
+    outputDevice->outputDevice->device = ((mtlDevice)deviceInfo.physicalDevice).retain;
     outputDevice->outputDevice->transferQueue = outputDevice->outputDevice->device.newCommandQueue;
 
     outputDevice->outputDevice->stagingBuffer = [outputDevice->outputDevice->device newBufferWithLength:(128 * 1024 * 1024) options:MTLResourceStorageModeShared];
diff --git a/projects/apis/metal/src/devices/metal_output_devices.h b/projects/apis/metal/src/devices/metal_output_devices.h
index d84715e..e6017d0 100644
--- a/projects/apis/metal/src/devices/metal_output_devices.h
+++ b/projects/apis/metal/src/devices/metal_output_devices.h
@@ -4,9 +4,7 @@
 #include <Metal/Metal.h>
 #include <MetalKit/MetalKit.h>
 
-struct gnPlatformPhysicalDevice_t {
-    id<MTLDevice> device;
-} gnPlatformPhysicalDevice;
+typedef id<MTLDevice> mtlDevice;
 
 struct gnPlatformOutputDevice_t {
     id<MTLDevice> device;