diff --git a/include/vkd3d_d3d12sdklayers.idl b/include/vkd3d_d3d12sdklayers.idl
index 31187f7e..027eeaa2 100644
--- a/include/vkd3d_d3d12sdklayers.idl
+++ b/include/vkd3d_d3d12sdklayers.idl
@@ -890,6 +890,15 @@ typedef enum D3D12_MESSAGE_ID
     D3D12_MESSAGE_ID_D3D12_MESSAGES_END
 } D3D12_MESSAGE_ID;
 
+typedef enum D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODE
+{
+    D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODE_NONE = 0x0,
+    D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODE_STATE_TRACKING_ONLY = 0x1,
+    D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODE_UNGUARDED_VALIDATION = 0x2,
+    D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODE_GUARDED_VALIDATION = 0x3,
+    NUM_D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODES = 0x4,
+} D3D12_GPU_BASED_VALIDATION_SHADER_PATCH_MODE;
+
 typedef struct D3D12_MESSAGE
 {
     D3D12_MESSAGE_CATEGORY Category;