diff --git a/reactos/include/psdk/ks.h b/reactos/include/psdk/ks.h
index 2249af3711a..b7f055102db 100644
--- a/reactos/include/psdk/ks.h
+++ b/reactos/include/psdk/ks.h
@@ -4068,6 +4068,14 @@ KsCreateFilterFactory(
     IN  PFNKSFILTERFACTORYPOWER WakeCallback OPTIONAL,
     OUT PKSFILTERFACTORY *FilterFactory OPTIONAL);
 
+KSDDKAPI
+NTSTATUS
+NTAPI
+KsFilterFactorySetDeviceClassesState(
+    IN PKSFILTERFACTORY FilterFactory,
+    IN BOOLEAN NewState
+    );
+
 KSDDKAPI
 NTSTATUS
 NTAPI