diff --git a/include/vkd3d_d3d12.idl b/include/vkd3d_d3d12.idl
index 4d96d25c..4bbd235c 100644
--- a/include/vkd3d_d3d12.idl
+++ b/include/vkd3d_d3d12.idl
@@ -413,6 +413,11 @@ typedef enum D3D12_HEAP_FLAGS
     D3D12_HEAP_FLAG_SHARED_CROSS_ADAPTER = 0x20,
     D3D12_HEAP_FLAG_DENY_RT_DS_TEXTURES = 0x40,
     D3D12_HEAP_FLAG_DENY_NON_RT_DS_TEXTURES = 0x80,
+    D3D12_HEAP_FLAG_HARDWARE_PROTECTED = 0x100,
+    D3D12_HEAP_FLAG_ALLOW_WRITE_WATCH = 0x200,
+    D3D12_HEAP_FLAG_ALLOW_SHADER_ATOMICS = 0x400,
+    D3D12_HEAP_FLAG_CREATE_NOT_RESIDENT = 0x800,
+    D3D12_HEAP_FLAG_CREATE_NOT_ZEROED = 0x1000,
     D3D12_HEAP_FLAG_ALLOW_ALL_BUFFERS_AND_TEXTURES = 0x00,
     D3D12_HEAP_FLAG_ALLOW_ONLY_BUFFERS = 0xc0,
     D3D12_HEAP_FLAG_ALLOW_ONLY_NON_RT_DS_TEXTURES = 0x44,