diff --git a/dlls/amstream/amstream_classes.idl b/dlls/amstream/amstream_classes.idl
index e6bda830b40..2251bf734e3 100644
--- a/dlls/amstream/amstream_classes.idl
+++ b/dlls/amstream/amstream_classes.idl
@@ -34,6 +34,13 @@ coclass MediaStreamFilter { interface IMediaStreamFilter; }
 ]
 coclass AMDirectDrawStream { interface IAMMultiMediaStream; }
 
+[
+    helpstring("AuStream Class"),
+    threading(both),
+    uuid(8496e040-af4c-11d0-8212-00c04fc32c45)
+]
+coclass AMAudioStream { interface IAMMediaStream; }
+
 [
     helpstring("MMStream Class"),
     threading(both),
diff --git a/dlls/amstream/main.c b/dlls/amstream/main.c
index c718f42448c..c581e516bd1 100644
--- a/dlls/amstream/main.c
+++ b/dlls/amstream/main.c
@@ -74,7 +74,8 @@ struct object_creation_info
 static const struct object_creation_info object_creation[] =
 {
     { &CLSID_AMMultiMediaStream, multimedia_stream_create },
-    { &CLSID_AMDirectDrawStream, multimedia_stream_create },
+    { &CLSID_AMDirectDrawStream, ddraw_stream_create },
+    { &CLSID_AMAudioStream, audio_stream_create },
     { &CLSID_AMAudioData, AMAudioData_create },
     { &CLSID_MediaStreamFilter, filter_create }
 };