diff --git a/tst/winfsp-tests/memfs-test.c b/tst/winfsp-tests/memfs-test.c
index 5f6d8834..2bfa6cf9 100644
--- a/tst/winfsp-tests/memfs-test.c
+++ b/tst/winfsp-tests/memfs-test.c
@@ -40,7 +40,10 @@ void *memfs_start_ex(ULONG Flags, ULONG FileInfoTimeout)
         FileInfoTimeout,
         1024,
         1024 * 1024,
-        MemfsNet == Flags ? L"\\memfs\\share" : 0,
+
+		0,0,0,  //  Slowio
+
+		MemfsNet == Flags ? L"\\memfs\\share" : 0,
         0,
         &Memfs);
     ASSERT(NT_SUCCESS(Result));