diff --git a/src/xenia/kernel/xboxkrnl/xboxkrnl_usbcam.cc b/src/xenia/kernel/xboxkrnl/xboxkrnl_usbcam.cc
index 8c02e50c6..40c3f1987 100644
--- a/src/xenia/kernel/xboxkrnl/xboxkrnl_usbcam.cc
+++ b/src/xenia/kernel/xboxkrnl/xboxkrnl_usbcam.cc
@@ -17,11 +17,17 @@ namespace xe {
 namespace kernel {
 namespace xboxkrnl {
 
-dword_result_t XUsbcamCreate(unknown_t unk1,  // E
-                             unknown_t unk2,  // 0x4B000
+dword_result_t XUsbcamCreate(dword_t buffer,
+                             dword_t buffer_size,  // 0x4B000 640x480?
                              lpunknown_t unk3_ptr) {
-  // 0 = success.
-  return X_ERROR_DEVICE_NOT_CONNECTED;
+  // This function should return success.
+  // It looks like it only allocates space for usbcam support.
+  // returning error code might cause games to initialize incorrectly.
+  // "Carcassonne" initalization function checks for result from this
+  // function. If value is different than 0 instead of loading
+  // rest of the game it returns from initalization function and tries
+  // to run game normally which causes crash, due to uninitialized data.
+  return X_STATUS_SUCCESS;
 }
 DECLARE_XBOXKRNL_EXPORT1(XUsbcamCreate, kNone, kStub);
 
diff --git a/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.cc b/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.cc
index cc7efe7f3..5d3dac99d 100644
--- a/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.cc
+++ b/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.cc
@@ -11,7 +11,6 @@
 
 #include "xenia/base/assert.h"
 #include "xenia/base/logging.h"
-#include "xenia/ui/d3d12/d3d12_util.h"
 
 namespace xe {
 namespace ui {
diff --git a/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.h b/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.h
index 5a5723ed3..fbc77aeef 100644
--- a/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.h
+++ b/src/xenia/ui/d3d12/d3d12_descriptor_heap_pool.h
@@ -106,4 +106,4 @@ class D3D12DescriptorHeapPool {
 }  // namespace ui
 }  // namespace xe
 
-#endif  // XENIA_UI_D3D12_D3D12_UPLOAD_BUFFER_POOL_H_
+#endif  // XENIA_UI_D3D12_D3D12_DESCRIPTOR_HEAP_POOL_H_
diff --git a/src/xenia/ui/d3d12/d3d12_upload_buffer_pool.h b/src/xenia/ui/d3d12/d3d12_upload_buffer_pool.h
index 6f8717ce7..9fc2ce45e 100644
--- a/src/xenia/ui/d3d12/d3d12_upload_buffer_pool.h
+++ b/src/xenia/ui/d3d12/d3d12_upload_buffer_pool.h
@@ -17,9 +17,6 @@ namespace xe {
 namespace ui {
 namespace d3d12 {
 
-// Submission index is the fence value or a value derived from it (if reclaiming
-// less often than once per fence value, for instance).
-
 class D3D12UploadBufferPool : public GraphicsUploadBufferPool {
  public:
   D3D12UploadBufferPool(D3D12Provider& provider,
diff --git a/src/xenia/ui/graphics_upload_buffer_pool.h b/src/xenia/ui/graphics_upload_buffer_pool.h
index 973a9a6bc..7f5a714d3 100644
--- a/src/xenia/ui/graphics_upload_buffer_pool.h
+++ b/src/xenia/ui/graphics_upload_buffer_pool.h
@@ -10,6 +10,7 @@
 #ifndef XENIA_UI_GRAPHICS_UPLOAD_BUFFER_POOL_H_
 #define XENIA_UI_GRAPHICS_UPLOAD_BUFFER_POOL_H_
 
+#include <cstddef>
 #include <cstdint>
 
 namespace xe {