diff --git a/reactos/include/ndk/iotypes.h b/reactos/include/ndk/iotypes.h
index a78a49ce13c..de2034cf23b 100644
--- a/reactos/include/ndk/iotypes.h
+++ b/reactos/include/ndk/iotypes.h
@@ -23,6 +23,9 @@ Author:
 // Dependencies
 //
 #include <umtypes.h>
+#if !defined(_NTIFS_)
+typedef PVOID PFS_FILTER_CALLBACKS;
+#endif
 
 #ifndef NTOS_MODE_USER