diff --git a/include/dxgibase.idl b/include/dxgibase.idl
index f1aafbf6..86ba5dc9 100644
--- a/include/dxgibase.idl
+++ b/include/dxgibase.idl
@@ -20,8 +20,12 @@ import "vkd3d_windows.h";
 
 import "dxgiformat.idl";
 
+cpp_quote("#ifndef DXGI_ERROR_INVALID_CALL")
 cpp_quote("#define DXGI_ERROR_INVALID_CALL   _HRESULT_TYPEDEF_(0x887a0001)")
+cpp_quote("#endif")
+cpp_quote("#ifndef DXGI_ERROR_DEVICE_REMOVED")
 cpp_quote("#define DXGI_ERROR_DEVICE_REMOVED _HRESULT_TYPEDEF_(0x887a0005)")
+cpp_quote("#endif")
 
 typedef struct DXGI_SAMPLE_DESC
 {