diff --git a/src/gallium/drivers/d3d12/d3d12_common.h b/src/gallium/drivers/d3d12/d3d12_common.h
index 12f6aee7c85..f01872d751a 100644
--- a/src/gallium/drivers/d3d12/d3d12_common.h
+++ b/src/gallium/drivers/d3d12/d3d12_common.h
@@ -28,6 +28,8 @@
 
 #ifndef _WIN32
 #include <wsl/winadapter.h>
+#else
+#include <unknwn.h>
 #endif
 
 #define D3D12_IGNORE_SDK_LAYERS