diff --git a/include/mfobjects.idl b/include/mfobjects.idl
index 203acc770f6..758fd82cb14 100644
--- a/include/mfobjects.idl
+++ b/include/mfobjects.idl
@@ -425,8 +425,11 @@ interface IMFRemoteAsyncCallback : IUnknown
     HRESULT Invoke([in] HRESULT hr, [in] IUnknown *pRemoteResult);
 }
 
-cpp_quote("#define MFASYNC_FAST_IO_PROCESSING_CALLBACK  0x0001")
-cpp_quote("#define MFASYNC_SIGNAL_CALLBACK              0x0002" )
+cpp_quote("#define MFASYNC_FAST_IO_PROCESSING_CALLBACK   0x00000001")
+cpp_quote("#define MFASYNC_SIGNAL_CALLBACK               0x00000002")
+cpp_quote("#define MFASYNC_BLOCKING_CALLBACK             0x00000004")
+cpp_quote("#define MFASYNC_REPLY_CALLBACK                0x00000008")
+cpp_quote("#define MFASYNC_LOCALIZE_REMOTE_CALLBACK      0x00000010")
 
 cpp_quote("#define MFASYNC_CALLBACK_QUEUE_UNDEFINED      0x00000000")
 cpp_quote("#define MFASYNC_CALLBACK_QUEUE_STANDARD       0x00000001")