diff --git a/include/strmif.h b/include/strmif.h
index 0186206df7..5006e2bbc4 100644
--- a/include/strmif.h
+++ b/include/strmif.h
@@ -304,6 +304,17 @@ typedef enum
 	AM_STREAM_CONTROL		= 1
 } AM_SAMPLE_PROPERTY_FLAGS;
 
+enum __MIDL_IFilterMapper_0001
+{
+	MERIT_PREFERRED	= 0x800000,
+	MERIT_NORMAL	= 0x600000,
+	MERIT_UNLIKELY	= 0x400000,
+	MERIT_DO_NOT_USE	= 0x200000,
+	MERIT_HW_COMPRESSOR	= 0x100050,
+	MERIT_SW_COMPRESSOR	= 0x100000,
+};
+
+
 
 /* structs. */