diff --git a/libs/vkd3d-common/blob.c b/libs/vkd3d-common/blob.c
index b12d9630..469f9810 100644
--- a/libs/vkd3d-common/blob.c
+++ b/libs/vkd3d-common/blob.c
@@ -16,6 +16,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
+#ifndef __MINGW32__
+#define WIDL_C_INLINE_WRAPPERS
+#endif
 #define COBJMACROS
 #define INITGUID
 #define CONST_VTABLE