diff --git a/demo/d3d12/main.c b/demo/d3d12/main.c
index d8bb406..a6873ba 100644
--- a/demo/d3d12/main.c
+++ b/demo/d3d12/main.c
@@ -1,4 +1,17 @@
 /* nuklear - 1.32.0 - public domain */
+
+/*
+ *   === IMPORTATE NOTE FOR D3D12 ===  
+ *
+ * Due to a bug in the Windows SDK that
+ * was fixed in version 10.0.22000.0 the
+ * D3D12 Backend requires this version as
+ * a minimum! Compiling with a lower version
+ * will result in compiler warnings and a
+ * crashing application!
+ * 
+ */
+
 #define COBJMACROS
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
diff --git a/demo/d3d12/nuklear_d3d12.h b/demo/d3d12/nuklear_d3d12.h
index a235d69..b05b7ab 100644
--- a/demo/d3d12/nuklear_d3d12.h
+++ b/demo/d3d12/nuklear_d3d12.h
@@ -611,7 +611,7 @@ nk_d3d12_init(ID3D12Device *device, int width, int height, unsigned int max_vert
     desc.SampleDesc.Quality = 0;
     desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
     desc.Flags = D3D12_RESOURCE_FLAG_NONE;
-    hr = ID3D12Device_CreateCommittedResource(device, &d3d12.heap_prop_upload, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_COPY_SOURCE, NULL, &IID_ID3D12Resource, &d3d12.upload_buffer);
+    hr = ID3D12Device_CreateCommittedResource(device, &d3d12.heap_prop_upload, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, &IID_ID3D12Resource, &d3d12.upload_buffer);
     NK_ASSERT(SUCCEEDED(hr));
     }
     /* Create constant buffer */
@@ -812,7 +812,7 @@ nk_d3d12_font_stash_end(ID3D12GraphicsCommandList *command_list)
     desc.SampleDesc.Quality = 0;
     desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
     desc.Flags = D3D12_RESOURCE_FLAG_NONE;
-    hr = ID3D12Device_CreateCommittedResource(d3d12.device, &d3d12.heap_prop_upload, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_COPY_SOURCE, NULL, &IID_ID3D12Resource, &d3d12.font_upload_buffer);
+    hr = ID3D12Device_CreateCommittedResource(d3d12.device, &d3d12.heap_prop_upload, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, &IID_ID3D12Resource, &d3d12.font_upload_buffer);
     NK_ASSERT(SUCCEEDED(hr));
     }