diff --git a/include/unknwn.idl b/include/unknwn.idl
index 9071973fbe1..d6799f45b21 100644
--- a/include/unknwn.idl
+++ b/include/unknwn.idl
@@ -20,7 +20,10 @@
 import "wtypes.idl";
 #endif
 
-/* Interfaces */
+cpp_quote("#ifdef WIDL_C_INLINE_WRAPPERS")
+cpp_quote("#define SAVE_WIDL_C_INLINE_WRAPPERS")
+cpp_quote("#undef WIDL_C_INLINE_WRAPPERS")
+cpp_quote("#endif")
 
 [
   local,
@@ -39,6 +42,10 @@ interface IUnknown
   ULONG Release();
 }
 
+cpp_quote("#ifdef SAVE_WIDL_C_INLINE_WRAPPERS")
+cpp_quote("#define WIDL_C_INLINE_WRAPPERS")
+cpp_quote("#endif")
+
 [
   object,
   uuid(00000001-0000-0000-C000-000000000046),