diff --git a/sys/nfs41_driver.c b/sys/nfs41_driver.c
index d8d88fd..3e609a1 100644
--- a/sys/nfs41_driver.c
+++ b/sys/nfs41_driver.c
@@ -2316,6 +2316,7 @@ NTSTATUS nfs41_DevFcbXXXControlFile(
         switch (fsop) {
         case IOCTL_NFS41_INVALCACHE:
             nfs41_invalidate_cache(RxContext);
+            status = STATUS_SUCCESS;
             break;
         case IOCTL_NFS41_READ:
             status = nfs41_upcall(RxContext);