diff --git a/src/sys/driver.c b/src/sys/driver.c
index 3c650131..7a76d495 100644
--- a/src/sys/driver.c
+++ b/src/sys/driver.c
@@ -110,7 +110,6 @@ FspUnload(
 
     if (0 != FspDeviceObject)
     {
-        IoUnregisterFileSystem(FspDeviceObject);
         IoDeleteDevice(FspDeviceObject);
         FspDeviceObject = 0;
     }