diff --git a/reactos/include/psdk/ks.h b/reactos/include/psdk/ks.h
index ee61049ae6d..4a6665b269f 100644
--- a/reactos/include/psdk/ks.h
+++ b/reactos/include/psdk/ks.h
@@ -3135,6 +3135,12 @@ KsPinDataIntersectionEx(
     IN  PFNKSINTERSECTHANDLEREX IntersectHandler OPTIONAL,
     IN  PVOID HandlerContext OPTIONAL);
 
+KSDDKAPI PKSFILTER NTAPI
+KsPinGetParentFilter(
+    IN PKSPIN Pin
+    );
+
+
 /* Does this belong here? */
 
 KSDDKAPI NTSTATUS NTAPI
@@ -3864,6 +3870,7 @@ NTAPI
 KsFilterAcquireProcessingMutex(
     IN  PKSFILTER Filter);
 
+
 KSDDKAPI
 NTSTATUS
 NTAPI