diff --git a/src/sys/cleanup.c b/src/sys/cleanup.c
index 66b6e96d..78afb90d 100644
--- a/src/sys/cleanup.c
+++ b/src/sys/cleanup.c
@@ -20,5 +20,7 @@ FspCleanup(
     UNREFERENCED_PARAMETER(DeviceObject);
     UNREFERENCED_PARAMETER(Irp);
 
+    PAGED_CODE();
+
     return STATUS_NOT_IMPLEMENTED;
 }
diff --git a/src/sys/driver.c b/src/sys/driver.c
index f997d766..59d969eb 100644
--- a/src/sys/driver.c
+++ b/src/sys/driver.c
@@ -105,6 +105,9 @@ DriverEntry(
         return Status;
     }
 
+    /* register as a file system; this informs all filter drivers */
+    IoRegisterFileSystem(FspDeviceObject);
+
     return STATUS_SUCCESS;
 }