diff --git a/include/amstream.idl b/include/amstream.idl
index 65bea0dc920..a5f32a91c1e 100644
--- a/include/amstream.idl
+++ b/include/amstream.idl
@@ -43,7 +43,9 @@ enum {
 
 enum {
 	AMMSF_ADDDEFAULTRENDERER = 0x00000001,
-	AMMSF_CREATEPEER         = 0x00000002
+	AMMSF_CREATEPEER         = 0x00000002,
+	AMMSF_STOPIFNOSAMPLES	 = 0x00000004,
+	AMMSF_NOSTALL		 = 0x00000008
 };
 
 enum {