diff --git a/dlls/quartz/quartz_strmif.idl b/dlls/quartz/quartz_strmif.idl
index ede51f680b2..ef19709a268 100644
--- a/dlls/quartz/quartz_strmif.idl
+++ b/dlls/quartz/quartz_strmif.idl
@@ -19,6 +19,12 @@
 cpp_quote("#include <wingdi.h>")
 #include "strmif.idl"
 
+[
+    threading(both),
+    uuid(670d1d20-a068-11d0-b3f0-00aa003761c5)  /* IAMCopyCaptureFileProgress */
+]
+coclass PSFactoryBuffer { interface IFactoryBuffer; }
+
 [
     helpstring("Filter Graph"),
     threading(both),