diff --git a/CMakeLists.txt b/CMakeLists.txt
index 910c1863..d47be918 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -470,6 +470,7 @@ foreach(tgt IN LISTS lego1_targets)
   target_include_directories(${tgt} PRIVATE $<$<BOOL:${ISLE_D3DRM_FROM_WINE}>:$<TARGET_PROPERTY:d3drm-wine,INTERFACE_INCLUDE_DIRECTORIES>>)
   target_link_libraries(${tgt} PRIVATE $<$<BOOL:${ISLE_USE_DX5}>:DirectX5::DirectX5> SDL3::SDL3)
   target_compile_definitions(${tgt} PRIVATE $<$<BOOL:${ISLE_USE_DX5}>:DIRECTX5_SDK>)
+  target_compile_definitions(${tgt} PRIVATE $<$<BOOL:${ISLE_D3DRM_FROM_WINE}>:D3DRM_WINE>)
 endforeach()
 
 # Make sure filenames are ALL CAPS
diff --git a/LEGO1/tgl/d3drm/impl.h b/LEGO1/tgl/d3drm/impl.h
index 413f7110..558671b4 100644
--- a/LEGO1/tgl/d3drm/impl.h
+++ b/LEGO1/tgl/d3drm/impl.h
@@ -5,7 +5,7 @@
 
 #include <d3drm.h>
 
-#ifdef DIRECTX5_SDK
+#ifndef D3DRM_WINE
 typedef DWORD LPD3DRM_APPDATA;
 #else
 typedef LPVOID LPD3DRM_APPDATA;